Question # 1

Gas exert pressure on walls of the visual because gas molecules.

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Posses momentum

Have finite volume

Collide with each other

Obey gas laws

The dimensional formula for torque is identical to.

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Kinetic energy

Pressure energy

Moment of force

All of the above

Which of the following is the science of measuring the heat of chemical reactions or physical changes.

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Thermometry

Calorimetry

Telemetry

Photometry

A uniform vertical wire is stretched by hanging a mass from its lower end Which of the following does ot effect the strain in the wire.

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The stress

The upstretched length

The load applied

the Young's modulus of the metal

The Step up transformer

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Increase the input current

Increases the input voltage

Has more turns in the primary coil

Has less time in the secondary coil

What type of process is the Carnot's cycle.

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Reversible

Irreversible

Neither reversible nor irreversible

May be reversible or irreversible

X-rays travel with

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The speed of light

The speed of sound

The speed of 3,000 m s-1

The speed of 3,500 m s-1

If a body is moving with constant velocity then

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Its acceleration is zero

Its direction may be changing

Its speed may be changing

Its acceleration is constant

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 continuous X rays spectrum is due to an effect.

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Bremsstrahlung

Breaking radiation

Holography

both a and b

In the experiment of production of X rays the anti cathode should be bombarded with.

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A particles

Beta particles

Electrons

Protons

The advantage of electron tube over a transistor is.

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Low consumption of power

Its high efficiency

Its high gain

Low input impedance

Which of the following represents an elastic wave.

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Light waves

Radiowaves

X-rays

Sound waves

Which principle is in effect when a ship displaces ocean water.

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Bernouli's

Pascal's

Hook's

Archimedes

The primary purpose of using a large aperture objective in a telescope is to produce

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Brighter image

Larger image

Wider field of view

Smaller image

In simple harmonic motion it is found that the total energy of a system.

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Is independent of the amplitude

Depends on the amplitude squared

Is independent of the mass

All of these

Reverberation is the

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Presence of large number of overtones

presence of harsh and discordant notes

Presence of ultrasonic vibrations

Persistence of audible sound after the source has stopped

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

The effective resistance offered by the resistance capacitance and inductance in an A.C. circuit is known as

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Impedance

Resistance

Capacitance

Reactance

If a body retains completely its altered shape and size, it is said to be

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Perfecto elasticity

Perfect plasticity

Elasticity

elastic limit

A application of the phenomenon of polarization is in

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The scattering of light beams

Explaining the blue colour of sky

Identifying chemicals elements

Analysis of mechanical stress

Which of the given geometries will result in the largest convection consfficient.

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Vertical plate

Diagonal plate

horizontal plate facing upwards

Horizontal plate facing downwards

When temperature increases, frequency of an organ pipe

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Decreases

Increases

Remain the same

Become zero

Which property of waves is independent of the others.

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Amplitude

Velocity

Frequency

Wavelength

The magnitude of the instantaneous velocity is called the.

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_Displacement

Speed

Acceleration

Length

Charge carriers in thermocouples are.

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Anions

Cations

Electrons

Protons

Lagging of magnetic flux density behind magnetic field is known as.

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Permeability

Susceptibility

Hysteresis

Uncertainty

If we use two diodes and a centre tapped transformer we will get.

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A transistor

An amplifier

A half wave rectifier

A full wave rectifier

Resonance phenomenon in a vibrating body

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May increase the amplitude

May decrease the amplitude

May not affected the amplitude

All of the above

Which of the following materials has highest magnetic suscaptibility.

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Uranium

aluminium

Platinum

Sodium

A body is thrown vertically upward with initial velocity 9.8 ms-1 it will reach the height.

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4.9 m

19.9 m

29.4 m

49.2 m

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