Question # 1

_{When a charged particle moves through a magnetic field it suffers a change in its}

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Charge

Mass

Energy

Direction of motion

The value of power factor in an LCR sense circuit at resonance is.

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Zero

0.5

unity

Infinity

The simple form of particle accelerator is.

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Cathode ray tube

Oscillator

_Amplifier

Phase locked loop

The gas thermometer is taken as the primary standard because.

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Thermometers are easily reproducible

Readings can be accurately taken

No correction are necessary

It produces he thermodynamic scale

As the mass number increases, the binding energy per nucleon in a nucleus

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Increases

Decreases

Remain constant

Varies in a way that depends upon A

Which example best illustrates the conservation of electrical energy to chemical energy.

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Starting a car

Generating hydroelectric power

Changing an accumulator

Melting a fuse

A choke coil is a coil with

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Low inductance and low resistance

Low inductance and high resistance

High inductance and low resistance

Low inductance and negligible resistance

The energy delivered to the tissue per unit mass is called the absorbed dose of.

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X rays

gama rays

Radiation

energy

Torque is equal to.

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The product of magnitude of force and acceleration

The product of magnitude of force and momentum

The product of magnitude of force and displacement

The product of magnitude of force and angular velocity

Which materials have exactly zero electrical resistivity.

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Metals

Insulators

Semi conductors

Super conductors

If D1 and D2 are the powers of two lenses placed in contact then the power of the combination will be.

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D1+D2

D1-D2

D1/D2

D1 x D2

Human's eye acts like a

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LASER

Mirror

Lens

Fibre optics

The process of mixing sound waves with carrier waves is known as.

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Rectification

amplification

Modulation

Demodulation

If the specific latent heat of vaporization of oxygen is 214 kJ kg-1 how much heat will be absorbed when 3.0 kg of oxygen is boiled off at its boiling point.

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14 kJ

64 k J

140 kJ

642 k j

The net charge on a condenser is

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Zero

Q/2

2Q

Infinity

A newly prepared radioactive nuclide has a decay constant Lamda of 10-6 s-1 What is the approximate half life of the nuclide.

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1 hour

1 day

1 week

1 month

Which quantity has different units from the other three.

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Density x volume x velocity

Rate of change of momentum

Young's modulus x area

Weight

Which of the following properties of sound is affected by change in air temperature.

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Amplitude

Intensity

Frequency

Wavelength

Cosmic rays mostly comprise of

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Neutral particles

Negative charged particles

Positively charged particles

Ions

Which of the following remains unaffected in a magnetic field.

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a particles

b partciles

gama particles

Electrons

The image of distant object as seen through as astronomical telescope is.

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Real and inverted

Virtual and inverted

Real and erect

Virtual and erect

Which of the following a natural example of a capactor.

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Fire

Snow

Air

Lightining

Light entering glass will not suffer change in

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Frequency

wavelength

Speed

Direction

If the dot product of two non zero vectors vanishes the vectors will be.

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any scalar quantity

Any negative number

Its magnitude but not direction

Its magnitude and direction

The law of inertia was first time formulated by

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Galileo

Newton

Kepler

Planck

Which law states that magnetization is inversely proportional to temperature for a fixed value fo the field.

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Curie's law

Voltmeter

Ammeter

Wattmeter

The dispersive power of a grating is

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Light used

Separation of lines

Frequency of light used

Independent of wavelength

The SI unit of modulus of elasticity us

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N m-2

N m-1

N m

N m -3

If air is replaced by any other dielectric medium, the force between two charges.

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Decreases

Increases

Remain the same

Becomes infinity

Huygen's concept of secondary waves.

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Allow us to find the focal length of a thick lens

Is a geometrical method to find a wave front.

Is used to determine the velocity of light

Is used to explain polarization

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

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