Question # 1

An electric current in conductors is due to the flow of.

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Positive ion

Negative ion

Positive charges

Free electrons

The fluid which is incompressible and non viscous is called.

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Viscous fluid

Nonideal fluid

Ideal fluid

Perfect fluid

Who invented the first closed tube thermometer in 1713

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Gabried Fahrenheit

Galileo

anders Celsius

Lord Kelvin

In vacuum all electromagnetic waves have the same.

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Frequency

Amplitude

Speed

Wavelength

The specific heat of liquid

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Decreases with temperature

Increases with temperature

Remains constant with change in temperature

Increases with pressure

The half life of radium -226 is

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1620 years

45 x 10⁹ years

3.8 days

23.5 minutes

Which current can pass through a capacitor continuously.

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Alternating current

Direct current

Eddy current

Pulsating current

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

A liquid surface tend to contract this phenomenon is due to

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Viscosity

Diffusion

Density

surface tension

On which of the following the object size as perceived by eye depends upon.

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Actual size of the object

Aperture of the pupil

Object distance from the eye

Size of the image formed on the retina

The diver spins faster when moment of inertia becomes

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Smaller

Greater

Double

zero

It is possible is distinguish between transvers and longitudinal waves from the property of.

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Refraction

Interference

Diffraction

Polarization

The phenomenon of beats takes place due to

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Longitudinal waves

Transverse waves

Stationary waves

Both a and b

A magnet is pushed horizontally towards a coil of insulated wire inducting an emf in the coilin which direction does the coil try to move.

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Downwards

Upwards

Away from the magnet

Towards the magnet

The rms value of alternating current is always

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Infinity

Unity

Positive

Negative

The unit generally used for measuring astronomical distances is.

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Parsecs

Light year

Metre

Kilometer

The minimum angle of incidence for which total internal reflection can occur is called.

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Right angle

Acute angle

Critical angle

Obtuse angle

A mercury in glass thermometer and thermocouple thermometer are both calibrated using the same fixed point of 0 oC and 100 oc when both temperature are used to measure the temperature of a body the temperature measured on both thermometers will be exactly the same

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For all temperatures between 0 oC and 100 o C only

Only are the fixed points

For all temperatures at all times

When converted to the Kelvin scale

In an accelerated or non - inertial frame of reference the weight of the body depends upon.

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Acceleration of the frame of reference

Velocity of the body

Momentum of the body

Velocity of the frame of reference

Two pure inductors each of self inductance L are connected in parallel The total inductance of the combination is.

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L

2L

L/2

L/4

The energy content of a wave is proportional to its.

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Wave velocity

Wave velocity squared

Frequency

Amplitude squared

When a liquid is hated retaining its liquid sate then its molecules gain.

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K.E.

P.E

Heat energy

Chemical energy

The magnetic force is simply a

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Reflecting force

Deflecting force

Restoring force

Gravitational force

On which parameter the path difference between two interfering waves depends upon.

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Amplitude

Pitch

Intensity

Phase angle

Wave motion in air consist of

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Longitudinal waves

Transverse waves

Seismic waves

Polarized waves

If length of second pendulum becomes four times than its time period will become

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Two times

Four times

Six times

Eight times

Which phenomenon is responsible formation of shadows.

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Interference of light

Diffraction of light

Polarization of light

Propagation of light

The nuclear model of the atom was derived partly from experiments involving the scattering of alpha particles performed by.

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Chadwick

Rutherford

Anderson

Einstein

Mean life of a radioactive sample is 100 s its half life will be

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0.693 s

1 s

6.93 s

69.3 s

Which of the following devoices are used for measuring temperature.

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Thermocouples

Thermistors

Thermometers

All of these

The patch followed by charge in an electric field is.

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Circular

LInear

Parabolic

Zig zag

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