Question # 1

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

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modification

voltage

current

resistance

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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1/3 V

2/3 V

3/2 V

3V

1 gm-cm^-3is equal to:

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10³kg-m^-3

10^-3kg-m^-3

1 kg-m^-3

10⁶kg-m^-1

If the formula PV = nRT, n denotes:

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Number of molecules per unit volume

Number of moles

Number of molecules

None of these

When a force of 0.5 N displaces a body through a distance of 2m in the direction of force, the work done is

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0.5 J

2 J

0.25 J

1 J

In case of metallic conductors, the charge carriers are

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Protons

Electrons

Antiprotons

Positrons

Both A and B

The area under line velocity-time graph is numerically equal to the

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speed of the body

acceleration of the body

distance covered by the body

none of them

A diode which can turn its current ON and OFF in nono seconds is called:

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LED

Photodiode

An ordinary diode.

Both (A) and (B)

Both (B) and (C)

The vibratory motion of a body whose magnitude of acceleration is directly proportional to the magnitude of its displacement and is always directed towards the equilibrium position is called

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rotatory motion

motion under gravity

angular motion

simple harmonic motion

An important part of photocopier is:

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Toner cartridge

Deflection plates

Charging electrode

Print head

None of these

When a body is performing S.H.M., its acceleration is

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inversely proportional to the displacement

directly proportional to the applied force

directly proportional to the amplitude

directly proportional to the displacement but in opposite direction

To observe diffraction phenomenon the size of a obstacle

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Should be much larger than the wavelength

Should be of the same order as the wavelength

Have no relation of wavelength

Should be exactly λ/2

Two bullets are fired simultaneously,horizontally and with different speeds from the same place.Which bullet will hit the ground first?

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The faster one

Depends on their mass

The slower one

Both will reach simultaneously

A capacitor of 2μF is connected with a battery of 12 volts the charge stored is

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2.5 × 10^-5 C

2.4 × 10^-6 C

2.4 × 10^-5 C

2.4 × 10^-6 C

The relative permitivity ∈_r for teflon is

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2.1

2.4

2.9

3.0

Polymers have naturally combinations like with

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Oxygen

Sulphuric

Hydrocarbons

Oxygen and carbons

A polaroid is:

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An adjustable shutter

A device used to analyze polarized light

A device used in polarimeter

A light filter

The diffraction of light occurs, due to interference, of

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Obstructed portion

Unobstructed portion

Both obstructed and unobstructed light

None of these

At what temperature adiabatic change equivalent ot isothermal change

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0°C

0K

Critical temperature

Above critical temperature

Torque is the resultant of

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Dot product of force and moment arm

Simple product of force and moment arm

Cross product between position vector and force

Addition of force and moment arm

The electrical forces between the molecules of a liquid are

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Repulsive

Attractive

Both A and B

None

Total mass when silver coins are added to box as 2.2 kg, 0.01001 Kg and 0.01002 Kg correct to appropriate precision

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2.3 Kg

2.2 Kg

2.43 Kg

2.67 Kg

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