Question # 1

The artillery shells travel along parabolic paths under the influence of

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magnetic field

electric field

electromagnetic field

gravitational field

The current that flows through the coil of a motor causes:

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Its shaft to revolve

Its brushes to rotate

Motor to move

Its shafts to rotate

None of these

During the nuclear changes, the law/s of conservation that hold/s are that of:

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Charge

energy

Momentum

Mass

All of these

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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Protactinium

Actinium

Uranium

Radium

Redon

The positive charge moving in one direction is equivalent in all external affects to a:

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Negative charge is moving in the same direction

Positive charge is moving in the opposite direction

Negative charge moving in the opposite direction

Positive charges moving in the same direction

None of these

A process in which no heat enters or leaves the system is called

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isochoric process

isothermal process

adiabatic process

none of them

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

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2

1

4

3

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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outwards

inwards

in either way

none of these

The energy of a photon is represented by

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h/c²

h/T

hc²

hf/c²

The fourth band is a:

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Silver band

Red band

Gold band

Either A or C

Either A or B

An intertial frame of reference is a frame of reference which is

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at rest

moving with uniform velocity

either at rest or moving with uniform velocity

none of these

Where the streamlines are very far apart from each other, the pressure will be

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low

zero

high

all of them

The weight 'mg' of the bob is resolved into

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one component

two components

three components

four components

The time period of pendulums of different lengths would be

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same

different

both of them

none of them

Electron volt is the unit of

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Potential difference

Energy

Resistance

Capacitance

If the ends of a wire are connected to a battery an electric field E will be set up at:

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The ends of the wire only

Mid points of the wire only

Every point within the wire

At nodes only

Both (B) and (D)

When certain area A is held parallel to the field lines, then:

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No lines cross this area

Maximum lines pass through this area

The number of lines are between zero and maximum

Both (A) and (B) correct

None of these

An induced current can be produced by:

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Constant magnetic field

Changing magnetic field

Varying magnetic field

Constant electric field

None of these

Which of the following changes at an antinode in a stationary wave?

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Density only

Pressure only

Both pressure and density

Neither pressure nor density

Ohm established a relation between

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voltage and resistance

voltage and charge

voltage and current

voltage resistance and charge

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

Neutrons are

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positive charge

negatively charged

massless

neutral

Structure of the nucleus was explained by

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J.J Thomson

Bohr

Millikan

Rutherford

The basis to define a temperature scale that is independent of material properties is provided by

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carbon cycle

nitrogen cycle

Carnot cycle

irreversible cycle

When the upward drag force of the fluid becomes equal to downward force of gravity of the droplet, then its velocity:

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Starts increasing

Starts decreasing

Becomes constant

Is called escape velocity

Where the streamlines are very close to each other, the pressure will be

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low

zero

high

all of them

At O° K which of the following properties of a gas will be zero?

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Kinetic energy

Potential energy

Vibrational energy

Density

Electromagnetic waves emitted by hot bodies are called:

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Photoelectrons

Alpha rays

Thermal radiation

None of these

According to slok's law, drag force depends on

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Radius of the spherical body

Terminal velocity of body

Coefficient of viscosity

All of above

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:

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Of same magnitude in the same direction

Of different magnitude in the same direction

Of same magnitude but in opposite direction

Of different magnitude in the opposite direction

None of these

The value of resistivity is the least for:

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Copper

Aluminimum

Silver

Tungsten

Iron

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