Question # 1

In L.C.R series A.C. circuit, the phase angle between current and voltage is

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Any angle between 0 and +π/2

π/2

π

Any angle between 0 andπ/2

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

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Voltmeter

Avometer

Ammeter

None of these

The equation of continuity is

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A₁A_{2 = V}₁V₂

A_1/_V_{1 =}A_2/V₂

_V_1/A₁₌V_2/A₂

A₁_V_{1 =}A₂V₂

For addition and subtraction purposes, absolute uncertainties are:

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Added

Subtracted

Multipiled

Divided

A man fires a bullet of mass 200 g at a speed of 5 m/s. The gun is of one kg mass. By what velocity the gun rebounds backwards?

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0.1 m/s

10 m/s

1 m/s

0.01 m/s

A point charge Q is placed at the mid-point of a line joining two charges. 4q and q. if the net force on charge q is zero. then Q must be equal to

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-q

+q

-2q

+4q

If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:

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Becomes Half

Becomes double

Is not affected

Becomes one fourth

None of these

Photocell is a device which converts

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chemical energy into electrical energy

electrical energy into light energy

heat energy into electrical energy

light energy into electrical energy

Intensity of light determines the:

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Energy of each photon

Number of photons

Speed of photons

Size of photons

None of these

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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Wien's constant

Stefen's constnat

Planck's constant

Boltzmann's constant

None of these

A constant volume gas thermometer is more sensitive than liquid thermometer because

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Gas expand more than liquid

Gases are easily obtained

Gases are much lighter

Gases do not easily change their state

The moment of inertia plays the same role in angular motion as in linear motion as

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Density

Weight

Mass

None of these

Energy can be obtained form solid waste by

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Direct combustion

Indirect combustion

Permentation

None of these

An inertial frame of reference in which acceleration is

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Very high

Very very low

Zero

None of these

Identify the correct unit of pressure among t bese

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kgms^-1

kgm^-1s^-2

kgm²s^-2

kgm^-2s^-1

A spherical wavefront is that which has

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A source

A point source

An extended source

None of these

The fibre core has constant refractive index such as

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1.48

1.5

1.52

1.56

Where in standing wave, do the vibrations of the medium occur?

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Only at the nodes

Only at the antinodes

At all points between the nodes

At all points between the antinodes

Crystalline solid do not show

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Sharp melting points

Flat faces

Long range order

Isotropic expansion coefficients

If they donot have a = 9.8 ms^-2 they would fly

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In the same orbit

Off in a straight the tangent to Earth

Leaving the present orbit

None of these

Acceleration means the speed of the body is

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Increasing

Decreasing

Just stop

None of these

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