Question # 1

Tick the one which is not a crystalline solid:

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Zirconia

Glass

Copper

Ceramic solid

An ionic compound

Two dissimilar metals joined at their ends kept at constant temperature constitute:

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Cell

Voltmeter

Thermocouple

Potentiometer

None of these

Example of vibratory motion is

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mass suspended from a spring

a bob of simple pendulum

mass attached to a spring placed

all of them

The highest value reached by voltage or current in one cycle is called

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root means square value

peak value

peak to peak value

instantaneous value

The current produced by moving a loop of wire across a magnetic field is called:

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Direct current

Magnetic current

Alternating current

Induced current

None of these

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

Density of fluid is defined as:

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Its volume to mass ratio

Product of volume and mass

Its mass of volume ratio

None of these

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

The crystalline structure of NaCI is

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rectangular

hexagonal

tetrahedral

cubical

Smaller the damping, the resonance will be

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more flat

more sharp

both of them

none of them

A ball is dropped from a height of 4.2 meters. To what height it will rise if there is no loss of KE after rebounding?

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4.2 m

8.4

12.6

None of these

In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased

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Number

K.E

P.E

Frequency

The self product of two vectors in cross product is

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Zero

Square of vector

Only same vector

None of these

When a silicon crystal is doped with pentavalent impurity which are

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Boron

Antimony

Gallium

None of these

Linear momentum is a vector quantity and has direction of

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Its displacement

Velocity

Acceleration

None of these

A.H Compton studied the scattering of X-rays by loosely bound electrons from a graph target in:

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1905

1911

19251

1923

Which of the following cannot have an effect on the weight of an object?

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The distance of the object from a planet

The acceleration of the object

The placement of the object on a different planet

The mass of the object

Electrons of an isolated atom are bound to the nucleus, and?

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can only have distinct energy level

can only have same energy level

may or may not have distinct energy

none of them

If a ball comes back to its starting point after bouncing off the wall several times, then its

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total displacement is zero

average displacement is zero

none of them

both of them

Photo phone was invented by

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Edison

Graham Bell

Bardeen

None of these

If the water exists from the pipe at the rate 1.5 kgs^-1at speed of 0.3 ms^-1. If the water strikes a wall normally, find the force on the wall is

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5.53 N

5.03 N

1.35 N

0.45 N

An optical fiber carries data in the form

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Lights signals

Sound signals

A wave

A particle

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