# MCAT/MCAT Physics Mcq Questions Electrostatics Sample Test,Sample questions

## Question: `A closed surface contains two equal and opposite charges. The net electric flux from the surface will be`

1.negative

2.positive

3.zero

4.data is insufficient

1.500 mm

2.5 x 10-3 mm

3.2 x 10-5 mm

4.2 x 10-3 mm

1.900 volts

2.9000 volts

3.90 volts

4.zero

1.60?

2.90?

3.180?

4.45?

## Question: `A point source of light placed in a homogeneous medium gives rise to`

1.a cylindrical wave front

2.an elliptical wave front

3.a spherical wave front

4.a plane wave front

1.luminous

2.non-luminous

3.incandescent

4.bright

## Question: `An electric charge at rest produces`

1.only a magnetic field

2.only an electric field

3.neither electric field nor magnetic field

4.both electric and magnetic fields

## Question: `An electric field can deflect`

1.neutrons

2.?-rays

3.both glass rod and silk acquire negative charge

4.none

1.diffraction

2.dispersion

3.interference

4.polarization

## Question: `Central spot of Newtons rings`

1.bright

2.dark for large wavelength

3.dark

4.bright for large wavelength

## Question: `Crystals of a material can behave as`

1.Convex lens

2.Interferometer

3.Diffraction grating

4.Concave

## Question: `Diffarction fringes are`

1.equally spaced

2.distance between them increases

3.distance between then decreases

4.they are adjacent with no space in between

## Question: `Diffraction effect is`

1.more for a round edge

2.less for a round edge

3.more for a sharp edge

4.less for a sharp edge.

1.9x107N

2.900N

3.9x105N

4.9x106N

## Question: `Electric flux linked with a surface will be maximum when`

1.the surface is held parallel to the electric field

2.the surface is held perpendicular to the electric field

3.the surface makes an angle of 45?with the field

4.all of the above

## Question: `Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will`

1.decrease

2.increase

3.remain constant

4.depends upon composition of dielectric

## Question: `Electric intensity being a vector quantity always points`

1.along the direction of force experienced by a unit positive charge

2.opposite to the direction of force experienced by a unit positive charge

3.perpendicular to the direction of force experienced by a uit positive charge

4.any of above

1.Newton

2.Einstein

3.Michelson

4.Galileo

## Question: `If free space between the plates of a capacitor is replaced by a dielectric`

1.The potential difference remains constant capacittance and energy stored increases

2.The potential difference remains constant capacittance decreases and energy increases

3.The potential difference decreases but both capacitance and energy increase

4.both potential difference and capacitance decrease but energy increases

1.double

2.half

3.four times

4.remains same

## Question: `In a plane polarized light`

1.vibration in all direction

2.vibration in two mutually perpendicular directions

3.vibration take place in a direction perpendicular to the direction of propagation of light

4.no vibration at all

## Question: `In an interference pattern`

1.bright fringes are wider than dark fringes

2.dark fringes are wider than bright fringe

3.both dark and bright fringes are of equal width

4.central fringes are brighter than the outer fringes

## Question: `In double slit experiment if one of the two slit is covered then`

1.no interference fringes are observed

2.no diffraction fringes are observed

3.no fringes observed

4.interference pattern not disturbed

1.? / 2

2.?/3

3.?/6

4.?/4

## Question: `In monochromatic red light a blue book will probably appear to be`

1.black

2.purple

3.green

4.no scientific reasoning available

1.Interference

2.Diffraction

3.Polarization

4.Refraction

## Question: `In Young double slit experiment, if white light is used`

1.alternate dark and bright fringes will be seen

2.coloured fringes will be seen

3.no interference fringes will be seen

4.impossible to predict

1.d?D

2.2?d/D

3.?D/d

4.?d/D

## Question: `Light on passing through a Polaroid is`

1.plane polarized

2.un-polarized

3.circularly polarized

4.elliptically polarized

1.diffraction

2.reflection

3.polarization

4.scattering

## Question: `The condition for constructive interference of two coherent beams is that the path difference should be`

1.integral multiple of ?/2

2.integral multiple of ?

3.odd integral multiple of ?/2

4.even integral multiple of ?

## Question: `The electric lines of force are`

1.imaginary

2.physically existing every where

3.physically existing near the charges

4.depends upon case

## Question: `The force per unit charge is know as`

1.electric flux

2.electric intensity

3.electric potential

4.all of above are same

1.crest

2.trough

3.wavelength

4.wave front

## Question: `The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire`

1.charge will flow from A to B

2.charge will flow from B to A

3.no flow of charge will occur

4.both a and b are possible

## Question: `The minimum charge on any object cannot be less than`

1.1.6 x 10-19C

2.3.2 x 10-19C

3.9.1 x 109C

4.no definite value exist

1.Newton

2.Michelson

3.Huygen

4.Young

1.10A?

2.1000 A?

3.1A?

4.100 A?

## Question: `Tick the correct statement`

1.the electric lines of force have no physical existence

2.they expand laterally and contract longitudinally

3.they do not cross each other and group together in dielectric

4.all the above statements are true

## Question: `Tick the only wrong statement.`

1.similar charges repel each other

2.dissimilar charges attract each other

3.repulsion is the sure test of electrification

4.an electrically neutral body is repelled both positively and negatively charged bodies

## Question: `Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become`

1.1/4th of its original value

2.1/8th of its original value

3.4 times of its original value

4.8 times of its original value

1.9 x 109N

2.9.2 x 104N

3.9 x 109N

4.9 x 107N

## Question: `Two sources of light are coherent if they emit rays of`

1.same wavelength

2.same amplitude of vibration

3.same wave length with constant phase difference

4.same amplitude and wavelength

1.4 x 10-10 m

2.2 x 10-10 m

3.0.02x10-10m

4.20x10-10m

## Question: `When crest of one wave falls over the trough of the other wave this phenomenon is known as`

1.polarization

2.constructive interference

3.destructive interference

4.diffraction

1.5000 nm

2.5000A?

3.500m

4.2000um

## Question: `When we rub a glass rod with a silk cloth then`

1.glass rod acquires negative charge while silk acquires positive charge

2.glass rod acquires positive charge while silk acquires negative charges

3.both glass rod and silk acquire negative charge

4.both glass rod and silk acquire positive charge

1.Diffraction

2.Polarization

3.Interference

4.Reflection

## Question: `Which one of the following cannot be polarized?`

2.ultraviolot rays

3.X-rays

4.sound waves

## Question: `Which one of the following is nearly monochromatic light ?`

1.light form fluorescent tube

2.light form neon lamp

3.light form sodium lamp

4.light form simple lamp

## More MCQS

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