Question # 1

The strength of the magnetic field around the current carrying conductor is

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Smaller near the conductor

Greater near the conductor

constant everywhere

Changing everwhere

Which of the given factors is increased in a step down transformer.

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Voltage

Current

Wattage

Resistance

The number of 0.0001 is abbreviated correctly by

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1 x 10⁴

10^-3

10^-4

0.1 x 10⁴

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

In microwave ovens, heating is produced by the phenomena of

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Reflection

Refraction

Damped oscillations

Resonance

Which particle are not emitted by a radioactive substance.

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Alpha particles

Beta particles

Gama particles

Neutrons

The angular frequency time period and frequency of a simple pendulum depends only on the.

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Mass and amplitude

Mass and gravitational acceleration

Amplitude and frequency

Length and gravitational acceleration.

Which effect explain the frequency shift that occurs when there is motion sound a listener or both relative to the medium.

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Early effect

Doppler's effect

Hall effect

Zeeman effect

The amount of heat needed per unit mass to raise the temperature of a system one degree at constant pressure is numerically aqual to

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The specific heat

The specific thermal energy

The specific heat at constant pressure

the internal energy of the gas

Which of the following is an electrical insulator that can be polarized by an applied electric field.

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Conductor

Condenser

Di electric

Capacitor

Telecommunication by Optical fibers is done by

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Single mode step index fibre

Multimode step index fibre

Multimode graded index fibre

All of the above

When light enters a denser medium

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Its speed slows down

Its speed increases

It is totally reflected

Its speed remains unchanged

Which electrical component may be used to store electrical energy in a time delay circuit

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Capacitor

Light dependent resistor

Resistor

Thermistor

Chromatic aberration can be removed by using.

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Convex lens

Two convex lenses

Concave lens

Combination of a convex lens and a concave lens

The velocity of the wave could be increased by

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Reducing the amplitude

Decreasing the frequency

Increasing the period

Stretching the spring more

In simple harmonic motion we have the conservation of.

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K.E.

P.E

Total energy

Electrical energy

If the pressure in a closed vessel is reduced by drawing some gas the mean free path of the gas molecules.

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Decreases

Remains constant

Increases

First increases then decreases

The ratio of specific heat capacity to motor heat capacity of a body

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Is a universals cantante

Depends upon the mass of the body

Depends upon the molecular weight of the body

Is dimensionless

Human's eye acts like a

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LASER

Mirror

Lens

Fibre optics

The final image produced by a microscope is.

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Real and erect

Virtual and erect

Real and inverted

Virtual and inverted

Which of the following is dimensionless.

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Strain

Stress

Pressure

Volume

A sonometer or audiometer is a device based on the principle of.

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Resonance

Beats

Overtones

Harmonics

As oscillator is basically an amplifier with loop gain

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Zero

Infinity

Less than unity

More than unity

A type of resistor whose resistance varies significantly with temperature is.

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Thermistor

Thermocouple

Strain gauge

Potentiometer

An electric lamp use energy at the rate of 46 W on a 12 V supply. How much charge passes through the lamp in 2s.

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0.15 C

0.50 C

2.0 C

8.0 C

The pitch of sound a determined by its

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Speed

Frequency

Direction

Number of beats

If a planet of mass double than that of the earth and radius three times greater than the earth a 10 kg mass on its surface will weight.

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2.2 N

4.4 N

6.7 N

13.2 N

The 'x' in X-rays means

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Xenon

Explosion

x for unknown

X makes the spot

Who discovered neutron in 1932.

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Chadwick

Bohr

Rutherford

Fermi

The magnifying power of a convex lens of focal length 5 cm is

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3

5

6

20

An object at the end of a spring oscillates with SHM of angular frequency 2 rad s-1 What is the period of oscillation.

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0.32 s

0.50 s

0.80 s

3.1 s

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