Question # 1

The electric field will be uniform

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Near a positive point charge

Near a negative point charge

Between two oppositely charged parallel metal plates

None of above

Direction of angular momentum is determined by:

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Right hand rule

Head to tail rule

Left hand rule

None of them

The force experienced by charged particle is maximum, if it moves

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parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

Particles have the mass smallest of following is

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Electron

Proton

Neutron

Quark

The waves which propagate out in space due to oscillation of electric and magnetic fields are known as

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e.m. waves

mechanical waves

sound waves

water waves

The RMS value of alternating current is:

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0.7 times at the peak value

0.5 times the peak value

0.7 times the Instantaneous value

Equal to maximum voltage

None of these

The magnetic field outside the solenoid due to current is

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strong

zero

weak

uniform

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

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adiabatically

isothermally

isochorcally

isobarically

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

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X-rays

Ultraviolet rays

y-rays

Cosmic rays

In the formula P = N₀KT, N₀denotes:

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Number of molecules per unit per volume

Number of moles

Number of molecules

None of these

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

The percentage errors in the measurement of mass and speed are 3% and 4% respectively.The maximum error in the measurement of kinetic energy is:

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11%

10%

8%

9%

Which of the following converts electrical signals into light signals?

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optical fibre

receiver

reflector

transmitter

A prism splits a beam of white light into its seven constituent colors.This is so because

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Phase of different colors is diferent

Amplitude of different colors is different

Energy of different colors is different

Velocity of different colors if different

The minimum distance between a source and the screen for which a real image is possible with a convex lens is

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Its focal length

Twice the focal length

Four times the focal length

Square of the focal length

Pure form of semiconductor is called

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Extrinsic semiconductor

Intrinsic semiconductor

N type

P type material

The dimensions [MLT^-1] refers to the quantity

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Force

Momentum

Impulse

None of these

The relation Cp > Cv by an amount equal to

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Gas constant

Universal gas constant

Both

None of these

The Permitivity ε_o of free space has the value in S.I. units is

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8.85 × 10^-10 C² N^-1 m^-2

8.85 × 10^-11 C² N^-1 m^-2

8.85 × 10^-12 C² N^-1 m^-2

8.85 × 10^-13 C² N^-1 m^-2

Wavelength of X-rays falling at a glancing angle of 30° on a crystal with atomic spacing 2 x 10^-10m for first order diffraction is

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4 x 10^-10m

2 x 10^-10m

0.2 x 10^-10m

20 x 10^-10m

To get three images of a single object,one should have two plane mirrors at an angle of

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90°

120°

30°

160°

If the incident light contains different wavelengths the images of each wavelength for a certain value is diffracted in the

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Same directions

Different direction

Opposite direction

None of these

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