# MCAT/MCAT Physics Mcq Questions Motion and Force Sample Test,Sample questions

1.rest

2.motion

3.velocity

4.force

## Question: `2nd law of motion gives the definition of`

1.force

2.acceleration

3.velocity

4.both force and acceleration

## Question: `3rd law of motion explains`

1.effect of force

2.existence of a force

3.existence of two forces

4.existence of pair of forces in nature

1.14 m

2.20 m

3.5 m

4.25 m

## Question: `A body is moving with uniform velocity. Its`

1.speed changes

2.acceleration changes

3.direction of motion changes

4.displacement from origin changes

1.10m/s

2.36m/s

3.zero

4.infinite

1.force

2.displacement

3.distance

4.acceleration

## Question: `During long jump, athlete runs before taking the jump. By doing so he`

1.provide him a larger inertia

2.decreases his inertia

3.decreases his momentum

4.increases his momentum

## Question: `Electron cannot exist in the nucleus it is confirmed by observing that`

1.It does emit ?-radiation.

2.Its size as compare to proton and neutron is very small.

3.No antiparticle of electron is present.

4.The velocity of electron must be very high according to uncertainty principle.

## Question: `In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is`

1.he/ev

2.he/Vc

3.eV/h

4.impossible to predict

## Question: `In He-Ne laser the lasing action is produced by`

1.Ne only.

2.He-Ne both

3.Electrons of He.

4.Electrons Ne.

## Question: `In laser production the state in which more atoms are in the upper state than in the lower one is called`

1.Metal stable state.

2.Normal state.

3.Inverted population.

4.All the above.

## Question: `In normal state of energy the incident high energy photons will be`

1.Stimulated.

2.Absorbed.

3.Cause X-ray emission.

4.Cause laser production

1.volume

2.density

3.mass

4.temperature

## Question: `Instantaneous and average velocities become equal when body`

1.has zero acceleration

2.has uniform acceleration

3.has variable acceleration

4.moves in a circle

## Question: `Maximum frequency in the spectrum from X-ray tube is directly proportional to the`

1.Number of incident electron i.e. filament current.

2.The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated.

3.The soft target which can easily emit electrons.

4.all of above are correct.

## Question: `Momentum depends upon`

1.force acts on the body

2.mass of the body

3.velocity of the body

4.both mass and velocity of the body

## Question: `Motorcycle safety helmet extends the time of collision hence decreasing the`

1.chance of collision

2.force acting

3.velocity

4.impulse

## Question: `Newtons laws do not hold good for particles`

1.at rest

2.moving slowly

3.move with high velocity

4.move with velocity comparable to velocity of light

1.A&B

2.B&C

3.A&C

4.A B & C

1.?-rays

2.X-rays

3.Far infrared.

4.Infrared

## Question: `Reflecting mirrors in laser is used to`

1.Further stimulation

2.Lasing more

3.For producing more energetic lasers.

4.All

1.acceleration

2.distance

3.force

4.momentum

## Question: `Taking off rocket can be explained by`

1.1st law of motion

2.2nd law of motion

3.Law of conservation of momentum

4.law of conservation of energy

1.-1

2.1

3.2

4.-2

## Question: `The characteristic X-rays spectrum is due to`

1.The illumination of the target metal by ultra-violet radiation.

2.The bombardment of the target by protons.

3.The bombardment of target by electrons.

4.The absorption of ? radiation by the target metal.

## Question: `The collision between two bodies be elastic if bodies are`

1.solid and soft

2.soft and elastic

3.solid and hard

4.hard and elastic

1.MLT-2

2.ML2T-2

3.ML2T2

4.ML-2T-2

1.10-4 sec

2.10-5 sec

3.10-3 sec

4.10-8 sec

## Question: `The minimum wavelength of X-rays can further be reduced by`

1.Reducing the pressure or cooling the target.

2.Increasing the temperature of the filament.

3.Using a target element of higher atomic number.

4.Increasing the potential difference between the cathode and the target.

1.6.2 x 10-10m

2.9.1 x 10-18m

3.3.11 x 10-10m

4.4 x 10-10m

1.? - rays

2.? - rays

3.? - rays

4.all of above

## Question: `The thrust on the rocket in the absence of gravitational force of attraction is`

1.constant

2.not constant

3.constant if the rate of ejected gases is constant

4.constant for short range rocket.

## Question: `The velocity of laser light is`

1.Less than ordinary light.

2.More than ordinary light.

3.Equal to ordinary light.

4.Different for different colours or frequency.

## Question: `UV radiation can be produced by`

1.Heating the filament.

2.Electron excitation in the gas.

3.Ionization of atoms.

4.All the above.

## Question: `Wave-like characteristic of electron is demonstrated by`

1.Line spectrum of atoms.

2.Production of x-rays.

3.Diffraction by crystalline solids.

4.Photoelectric effect.

1.tan-1 1/4

2.tan-1 4

3.tan-1 1/2

4.tan-1 2

## Question: `What is the shape of velocity, time graph for constant acceleration?`

1.straight inclined line.

2.parabola

3.inclined curve

4.declined curve

1.h/m?

2.2h/m?

3.mh/h

4.(2hc/m?)1/2

## Question: `When a body moves in a straight line then its displacement coincides with`

1.distance

2.force

3.acceleration is zero

4.both (a) and (b)

## Question: `When body is in motion, ________ always changes.`

1.its velocity

2.its acceleration

3.its position vector

4.its momentum

## Question: `When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to`

1.centripetal force

2.gravitational force

3.their inertia

4.centrifugal force

## Question: `When collision between the bodies in a system is inelastic in nature then for system`

1.momentum changes but K.E remain conserve

2.K.E changes but momentum remain conserve

3.both momentum and K.E changes

4.both momentum and K.E conserve

1.5m/s, 1m/s

2.3m/s, 3m/s

3.6m/s, 1m/s

4.4m/s, 2m/s

## Question: `When velocity time graph is a straight line parallel to time axis then`

1.acceleration is const

2.acceleration is variable

3.acceleration is zero

4.velocity is zero

## Question: `Which law of motion is also called law of inertia?`

1.1st law

2.2nd law

3.3rd law

4.all 1st, 2nd and 3rd laws

## Question: `Which of the following is not an example of projectile motion.`

1.a gas filled ballon

2.bullet fired from gun

3.a football kicked

4.a base ball shot

## Question: `Which of the following pair has same direction always?`

1.force, displacement

2.force, velocity

3.force, acceleration

4.force, momentum

1.H=gT2/8

2.H=8T2/g

3.H=8g/T2

4.H=gT2

## Question: `X-rays are diffracted by a crystal but not by a diffraction grating because`

1.The ions in a crystal are well arranged.

2.The lines in a diffraction grating cannot reflect X-rays.

3.The penetration power of X-rays is high in a diffraction grating.

4.The wavelengths of X-rays are of the same order of magnitude as the separation between atoms in a crystal

## More MCQS

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