Question # 1

The direction of force on a moving negative charge will be.

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Opposite to that of positive charge

Similar to that of positive charge

At right angel to the positive charge

Parallel to the positive charge

Induced current in a circuit depends upon

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The speed with which the conductor moves in the magnetic field

Resistance of the loop

Direction of the loop

Shape of the loop

Which particle has zero charge and zero rest mass.

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Neutron

Proton

Electron

Photon

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

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Permeability

Susceptibility

Hysteresis

Uncertainty

When a body is lifted through a height 'h' the work done on the body appears in the form of.

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K.E

P.E

Heat

Density

If the vector sum of all the torques is zero then

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1st condition is satisfied

2nd condition is satisfied

Centre of mass is lowered

Gravity becomes zero

Crystalline solids are of.

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Short range order

Long range order

Intermediate range

Plastics

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

at room temperature the p.d. between the two sides of depletion region for silicon is of the order of.

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0.3 V

0.5 V

0.7 V

0.9 V

A standard fixed point for calibrating a thermometer is.

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Boiling point of water

Melting point of ice

Temperature of steam

Triple point of water

An alternation produced in shape length or volume when a body is subjected to some external force is.

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Deformation

Polymerization

Crystallization

Elasticity

Nuclear force exists between

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Proton proton

Neutron -neutron

neutron -proton

All of these

When white light is incident on a diffraction grating, the light that will eb deviated from central image will be.

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White

Yellow

Red

Blue

The ratio of intensities of two sound waves is 4 : 9 what will be the ratio of their amplitudes.

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9:4

2:3

3:2

4:9

Monochromatic light passing through a thick prism is.

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Polarize

Disperesed

Diffracted

Deviated

The blooming of the image due to dispersion in lenses is called.

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spherical aberration

Chromatic aberration

Astigmation

Curvature of image field

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

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Zero

0.5

unity

Infinity

One weber is equal to.

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N A-1

N m-1 A

N mA-1

N m-1 A-1

The absorption of X-rays in a given material follows.

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A parabola path

Is straight line

An exponential curve

A circle

If an athlete uses 50 J of energy to lift a load in 2 s his muscular power is.

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125 W

250 W

500 W

1,000 W

Half life of a radioactive elements 10 minutes If the initial cont. rate is 368 counts per minute for what time count rate reaches 32 counts per minute.

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20 minutes

40 minutes

80 minutes

120 minutes

The process of conversation of a photon into an electron and a position is called.

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Pair annihilations

Pair production

Photoelectric effect

Compton effect

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

Bohr's atomic model assumes

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Nucleus is of infinite mass and is at rest

electron in a quantized orbit will not radiate energy

Mass of electron remains the same

All of the above

If a wave vibrates 10 times in one second with a speed of 10 m s-1 the wavelength will be.

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1 m

10 m

20 m

100 m

The decay to form other nuclides by emitting particles and electromagnetic radiations by unstable nuclides is called.

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Nuclear stability

Radioactivity

Carbon dating

Spontaneously

The proportion of crystalline to amorphous regions in a polymer depends on its

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Chemical composition

Molecular arrangement

Physical state

Chemical composition and molecular arrangement

Which one of the following describes a measure of opposition to alternating current.

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Electrical impedance

Capacitance

Inductance

Admittance

In an isobaric process there is no.

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Pressure change

Internal energy change

Heat exchanged

volume change or work done

The wavelength is the distance along the line of wave propagation between two successive particles which have equal

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Velocities

Phases

Amplitude

Displacements

Which one of the following is an example of a reversible process.

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Work done against friction

Heat produced by current

Melting of ice

See back effect

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