Question # 1

A circuit has a resistance of 11Ωan inductive reactance of 25Ωand a capacitance reactance of 18Ω. It is connected to an a.c. source of 200 V and 50 Hz. The current through the circuit (in amperes) is

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11

15

18

20

A point on the rim of a wheel moves 0.2 m when the wheel turns through an angle of 14.3 degrees. The radius of the wheel is:

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0.05 m

0.08 m

0.8 m

0.008 m

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

The induced current in the loop can be Increased by

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Using a stronger magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All above

Both A and B

When an object moves with a uniform angular velocity, then its instantaneous angular velocity is equal to:

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Zero

Its average velocity

Its angular displacement

None of these

The number of "Earth stations" which transmit signals to satellites and receive signals from them are:

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3

24

126

200

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

Another mean of electric potential energy per unit charge is given by:

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Electric intensity

Potential gradient

Electric Flux

Potential difference

None of these

The total reactance of a series RLC circuit at resonance is

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zero

Equal to the resistance

Infinity

Capacitive

If force and displacement are in opposite direction, the work done is taken as:

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Positive work

Negative work

Zero work

Infinte work

When heat is removed from the system

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negative

positive

zero

any one of them

The value of E₀in coulomb's law is:

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9 x 10⁹Nm²C^-2

8.85 x 10^-12C²N^-1m^-2

8.85 x 10^-12Nm²C^-2

9 x 10⁹C²N^-1m^-2

Free oscillations are always produced by:

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An applied force

Gravitational force

Restoring force and inertia

Inertia only

If you are moving at relativistic speed between two points that are a fixed distance apart, then the distance between the two points appers

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larger

shorter

equal

none of these

Alfa particles are

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hydrogen nuclei

helium nuclei

electrons

photons

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

Which of the following does not exhibit S.H.M?

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a plucked violin string

a mass attached to a spring

a train shunting between two terminals

a simple pendulum

The motion of a body in a straight line is the motion in

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one dimension

two dimension

three dimension

four dimension

When a nucleus emits an alpha particle, it atomic mass decreased by

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2

1

4

3

A certain force gives an acceleration of 2 m/sec²to a body mass 5 kg. The same force would give a 20 kg object an acceleration of:

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0.5 m/sec²

5 m/sec²

1.5 m/sec²

9.8 m/sec²

Electromagnetic waves emitted by hot bodies are called:

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Photoelectrons

Alpha rays

Thermal radiation

None of these

Which instrument is expensive and difficult to use?

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Voltmeter

Potentiometer

CRO

Both A and C

Both A and B

The density of blood is nearly equal to that of

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mercury

sodium

water

honey

The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

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classical mechanics

Newtonian mechanics

quantum mechanics

statistical mechanics

The CRO is used for displaying the waveform of a given

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current

voltage

both of them

none of them

Blood has a density

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Equal to water

Greater then water

Lesser then water

None of these

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

The electric field, magnetic field and the direction of their propagation are mutually

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perpendicular

parallel

none of these

In an adiabatic process the work is done at the expense of the

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energy supplied to the system

energy gained from the surroundings

internal energy

none of them

Newton published laws of motion in his famous book "principia" in

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1867

1667

1676

1687

A body is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about

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80 m

20 m

160 m

40 m

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