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00:00question number one is which is a base unit a Newton b steradian c second d pascal is Newton
00:18pascal are the derived units and steradian is supplementary unit so second is a base unit so
00:28the correct option will be c second question number two is radian is a unit of a plane angle b solid
00:39angle c area d radius is the unit of solid angle is steradian the unit of area is meter square or
00:50square meters the unit of radius is meter so the correct option will be a plane angle
00:57the unit of plane angle is radian question number three is one milli is equal to a 10 cube b 10 raised
01:10power minus 3 c 10 raised power 5 d 10 raised power minus 6 is one milli is equal to 10 raised power
01:21minus 3 so the correct option will be b 10 raised power minus 3 question number four is which of the
01:31following is derived quantity a force b velocity c acceleration d all of the above is force velocity
01:42and acceleration all are derived quantities so the correct option will be d all of the above
01:49question number five question number five is the branch of physics which deals with the
01:55velocities approaching the velocity of light is called a quantum mechanics b relativistic mechanics
02:04c classical mechanics d wave mechanics as the correct option will be b relativistic mechanics
02:14question number six question number six is silicon can be obtained from a metals b chemicals c sand d stones
02:26as silicon can be obtained from sand so the correct option will be c sand question number seven is the reverse
02:37of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of vector of
03:07A one component, B two components, C three component, D zero component.
03:17As vector in space has three components means X, Y and Z components.
03:25So the correct option will be C three component.
03:31Option number nine is the dimensions of gravitational constant capital G are A MLT power minus two
03:40B ML cube T power minus two C M inverse L cube T power minus two D M inverse L T power minus
03:52two as the dimensions of capital G are M inverse L cube T power minus two.
04:00So the correct option will be C M inverse L cube T power minus two.
04:07Question number 10 is two equal and opposite forces acting on a body form a A couple B torque
04:17C impulse D momentum as when two equal and opposite forces acting on a body then they form a couple
04:25which produces rotational motion.
04:30So the correct option will be A couple.
04:36Question number 11 is the dimensions of torque are A ML square T power minus two B ML T power
04:45minus two C ML T inverse D M T power minus two.
04:53As the dimensions of torque are same as the dimensions of work.
04:58So the dimensions of torque are ML square T power minus two.
05:04So the correct option will be A ML square T power minus two.
05:11Question number 12 is a bullet hits and gets embedded in a solid block resting on a horizontal frictionless
05:23table.
05:24What is conserved?
05:25A momentum and kinetic energy B momentum only C kinetic energy only D neither momentum nor kinetic
05:35energy.
05:36As in this condition momentum is conserved only.
05:41So the correct option will be B momentum only.
05:48Question number 13 is a rocket works on the principle of conservation of A Moss B linear momentum C energy
05:57D angular momentum is rocket works on the principle of conservation of linear momentum.
06:06So the correct option will be B linear momentum.
06:11Question number 14 is if average acceleration is equal to instantaneous acceleration a body is
06:20said to be moving with A variable velocity, B uniform velocity, C variable acceleration, D uniform acceleration.
06:32As when average acceleration will be equal to instantaneous acceleration then the body will move with uniform
06:41or constant acceleration.
06:42So the correct option will be D uniform acceleration.
06:50Question number 15 is a force is applied on a body produces acceleration in its own direction.
07:00This is the statement of A Newton's first law B Newton's third law.
07:06See Newton's law of gravitation D Newton's second law.
07:12As Newton's first law states that a body at rest or uniform motion will continue its state
07:19of rest or uniform motion until an external unbalanced force is not acted upon it.
07:28And Newton's third law states that every action has reaction which is equal in magnitude but
07:33opposite in direction.
07:36And Newton's law of gravitation or universal gravitation states that gravitational force is directly proportional
07:43to the product of masses and inversely proportional to the square of the separation or distance between
07:50them.
07:51So the correct option will be D Newton's second law.
07:56This is the statement of Newton's second law.
08:02Question number 16 is a collision in which the kinetic energy of the system is not conserved is called
08:10A inelastic collision, B elastic collision, C one dimensional collision, D none of these is
08:22kinetic energy is not conserved in inelastic collision.
08:27So the correct option will be A inelastic collision.
08:34But in elastic collision both momentum and kinetic energy are conserved.
08:41And in inelastic collision only momentum is conserved but kinetic energy is not conserved.
08:50Question number 17 is 1 dyne is equal to A 10 cube Newton, B 10 raised power 5 Newton, C 10
09:01raised power minus 5 Newton, D 10 raised power 7 Newton is 1 dyne is equal to 10 raised power
09:10minus 5 Newton.
09:12So the correct option will be C 10 raised power minus 5 Newton.
09:19Question number 18 is during the projectile motion the horizontal component of velocity A changes
09:26with time B becomes 0 C remains constant D increases with time.
09:33Question number 18 is during the whole projectile motion the horizontal component of velocity
09:38will remain constant but vertical component of velocity is variable.
09:45So the correct option will be C remains constant.
09:51A solar cell is a device which converts solar energy into A heat energy, B chemical energy,
09:58C nuclear energy, D electrical energy, A solar cell is a device which converts solar energy
10:06into electrical energy.
10:08So the correct option will be D electrical energy.
10:15Question number 20 is the kinetic energy of a body depends upon A its mass, B its velocity,
10:23C both mass and velocity, D none of these.
10:28Because the formula to calculate kinetic energy is Ke is equal to 1 upon 2 mv square.
10:34So kinetic energy depends upon both mass and velocity.
10:39So the correct option will be C both mass and velocity.
10:46Question number 21 is the value of small g at the center of the earth is A double B zero C
10:56infinite D remains same.
10:59As the value of small g means acceleration due to gravity at the center of earth is zero.
11:07So the correct option will be B zero.
11:12Question number 22 is the force that keeps the planets in orbit around the sun is called
11:19A gravitational force, B electromagnetic force, C nuclear force, D tension force.
11:28As the gravitational force keeps the planets in orbit around the sun.
11:33So the correct option will be A gravitational force.
11:40Question number 23 is which type of radiation is emitted by a radioactive material during alpha
11:47decay?
11:48A gamma rays, B beta particles, C alpha particles, D x rays.
11:56The correct option will be C alpha particles.
12:03Question number 24 is which material is used in making the core of an electromagnet?
12:10A copper, B soft iron, C aluminum, D steel.
12:17The correct option will be B soft iron.
12:22Question number 25 is which material is commonly used as the filament in an electric bulb?
12:31A copper, B tungsten, C aluminum, D iron.
12:36As the correct option will be B tungsten.
12:40Tungsten is used as the filament in an electric bulb.
12:46Question number 26 is which law defines the relationship between voltage, current and resistance?
12:53A ohm's law, A ohm's law, B faraday's law, C ampere's law, D Kirchhoff's law.
13:01As the equation of ohm's law is V is equal to IR, where V is electric potential or voltage,
13:09I is current and R is resistance.
13:13So the correct option will be A ohm's law.
13:19Question number 27 is what is the energy required to remove an electron from an atom called A ionization
13:28energy, B binding energy, C potential energy, D kinetic energy.
13:33The correct option will be A ionization energy.
13:40Question number 28 is which of the following element is commonly used in nuclear reactors
13:48is a fuel?
13:51A uranium, B hydrogen, C carbon, D helium.
13:56As uranium is used as a nuclear fuel in nuclear reactors.
14:02So the correct option will be A uranium.
14:08Question number 29 is which of the following is the fastest mode of heat transfer?
14:14A conduction, B convection, C radiation, D diffusion.
14:20As radiation is the fastest mode of heat transfer.
14:25So the correct option will be C radiation.
14:30Question number 30 is which material shows the property of superconductivity at very low
14:38temperatures?
14:39A copper, B aluminum, C mercury, D iron.
14:44The correct option will be C mercury.
14:48C mercury shows the property of superconductivity at very low temperatures.
15:00Question number 31 is in which of the following does the speed of light in the medium increase?
15:07A air, B water, C gloss, D diamond.
15:14As the speed of light increase in air, so the correct option will be A air.
15:31Question number 32 is which of the following colors of light has the shortest mode of light
15:37wavelength, A red, B green, C blue, D violet.
15:47Red has the highest wavelength means longest wavelength and lowest frequency.
15:56But violet has shortest wavelength and longest or highest frequency.
16:04So the correct option will be D violet.
16:08Violet has shortest wavelength.
16:12Question number 33 is what is the escape velocity of an object from the earth's surface?
16:20A 7.5 km per second.
16:23B 8.5 km per second.
16:26C 11.2 km per second.
16:29D 12.5 km per second.
16:32The correct option will be C 11.2 km per second.
16:38Question number 34 is what is the change in momentum of an object called A force, B work,
16:49C impulse, D energy is change in momentum per unit time is known as force, and work is the
16:58dot product of force and displacement, energy is the ability of a body to do work.
17:05So the correct option will be C impulse.
17:08Impulse is the change in momentum of an object.
17:15Question number 35 is which of the following has the highest refractive index, A air, B water,
17:23C gloss, D diamond.
17:26As diamond has highest refractive index, so the correct option will be D diamond.
17:36Question number 36 is which of the following is the fastest medium for sound waves, A air,
17:44B water, C vacuum, D solid is speed of sound in solids is greater than water, and speed
17:55of sound in water is greater than gases means air.
18:00So the correct option will be D solid, but in vacuum the speed of sound will be zero.
18:10Question number 37 is what happens to the resistance of a conductor when its temperature increases,
18:18A increases, B decreases, C remains the same, D becomes zero.
18:25Question number 38 is, what is the shape of the path of a projectile under the influence
18:51of gravity, A circular, B elliptical, C parabolic, D hyperbolic, as the path of the projectile
19:01under the influence of gravity is parabolic in shape.
19:06So the correct option will be C parabolic.
19:11Question number 39 is which physical quantity is represented by the slope of a velocity time
19:19graph, A displacement, B acceleration, C speed, D force, is the slope of velocity time graph
19:30gives acceleration, so the correct option will be B acceleration.
19:37Question number 40 is which element is used in thermometers for measuring high temperatures,
19:44A mercury, B alcohol, C platinum, D gallium, as gallium is used for measuring high temperatures
19:55in thermometers, so the correct option will be D gallium.
20:00Question number 41 is what is the main element used in the core of a nuclear reactor, A uranium,
20:08B thorium, C plutonium, D carbon, as uranium is the main element used in the core of a nuclear
20:21reactor, so the correct option will be A uranium.
20:26Question number 42 is which particle is the heaviest among the following, A electron, B proton, C neutron,
20:35D alpha particle, D alpha particle, as alpha particle is the heaviest among the following,
20:42and it is also known as helium nuclei, so the correct option will be D alpha particle.
20:51Question number 43 is which phenomena explains the splitting of white light into its component
20:58colors, A reflection, A reflection, B reflection, C dispersion, D diffraction, is the splitting
21:07of white light into its component colors, means seven colors, is known as dispersion, so the
21:14correct option will be C dispersion.
21:19Question number 44 is which principle explains the working of a hydraulic lift, A Archimedes principle,
21:27B Pascal's law, C Bernoulli's principle, D Newton's third law, is the working of hydraulic lift,
21:39is based on the principle of Pascal's law, so the correct option will be B Pascal's law.
21:47Question number 45 is what is the force responsible for an object moving in a circular path, A
21:57centripetal force, B gravitational force, C electromagnetic force, D frictional force, A centripetal force,
22:04A centripetal force is a force which keeps body moving along circular path, so the correct option
22:11will be A centripetal force.
22:17Question number 46 is which law describes the relationship between the volume and temperature of a gaze at
22:25constant pressure, A Boyle's law, B Charles's law, C Avogadro's law, D Gallusac's law.
22:36As Charles's law states that volume of the given mass of gaze is directly proportional to the
22:42absolute temperature, if the pressure of the system is kept constant.
22:47So the correct option will be B Charles's law.
22:52Question number 47 is which law states that the current through a conductor is directly proportional
23:01to the voltage across it?
23:03A Ohm's law, B Kirchhoff's law, C Faraday's law, D Ampere's law.
23:10So the correct option will be A Ohm's law.
23:25Question number 48 is what is the term for materials that allow electricity to flow through them easily?
23:33A conductors, B insulators, C semiconductors, D resistors.
23:40Resistors oppose to the flow of electric current.
23:44Semiconductors partially allow electric current to flow through them.
23:49Insulators do not allow electricity or electric current to flow through them.
23:54But conductors allow electricity or electric current to flow through them easily.
24:00So the correct option will be A conductors.
24:06Question number 49 is what is the work done when an object is moved in a circular path and returns
24:15to its starting point?
24:17A positive, B negative, C zero, D infinite.
24:22The correct option will be C zero.
24:27Question number 50 is which law states that the volume of a gas is inversely proportional to its pressure?
24:36A Charles law, B Avagadro's law, C Boyle's law, D Gallusack's law.
24:44As Boyle's law states that volume of the given mass of gas is inversely proportional to the pressure if the temperature of the system is kept constant.
24:57So the correct option will be C Boyle's law.
25:01Thanks for watching.
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