Question # 1

Example of progressive wave is

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transverse waves

longitudinal waves

both of them

none of them

The sources of magnetic field are

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isolated magnetic poles

charges at rest

charges in motion

none of these

Charge on proton is

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1.59 x 10^-9C

1.59 x 10^-7C

-1.59 x 10^-19C

1.59 x 10^-19C

The half life of uranium-238 is

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6.2 x 10⁹years

4.5 x 10⁹days

4.5 x 10⁹years

1.3 x 10⁶years

Two projectiles are fired from the same point with the same speed at angles of projection 60° and 30° respectively. Which one of the following is true?

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Their range will be same

Their maximum height will be same

Their landing velocity will be same

Their time of flight will be same

Electromagnetic waves transport:

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Energy only

Momentum only

Both A and B are correct

None of is correct

Which one is the least multiple

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Pico

Femto

Nano

Atto

The SI unit of magnetic flux is.

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weber

Nm^-1A^-1

tesla

gauss

A weakly damped system has fairly

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sharp resonance curve

flat resonance curve

both of them

none of them

The temperature at which the vibrations become so great that structure of the Crystal breaks up, is called:

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Critical temparature

Temperature of vaporization

Melting point

Both (A) and (C)

Both (A) and (B)

An inertial frame is that frame in which

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a>0

a=0

a<0

none of these

When the velocity of a body is doubled

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Its K.E is doubled

Its P.E doubled

Its momentum is doubled

Its acceleration is doubled

When a body is moving with uniform positive acceleration, the velocity-time,then the body is said to have

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uniform deceleration

uniform negative acceleration

average acceleration

uniform positive acceleration

A ball is dropped vertically down and it takes time t to reach the ground.At time t/2:

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The hall had covered exactly half the distance

The velocity of the ball was V/3 where V is the velocity when it reached the ground

The ball had covered less than half the distance

The ball had covered more than half the distance

Once heat is transferred to an object, it is converted into the

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Entropy of the object

Internal energy of the object

Temperature of the object

None of these

A straight current carrying conductor experiences maximum forces in a uniform magnetic field when it is placed:

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Parallel to the field

Perpendicular o the field

At an angle of 45 to the field

None of these

Supplementary unit/units in S.I. Units are

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Radian

Steradian

Candela

a and b

The drag force F on a sphere of radius 'r' moving slowly with speed V through a fluid of viscosity η by Stake's law

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F = πηra

F = 6πηrω

F = 6πηrV

F = 6πηraV

A cable breaks if stretched by moe than 2mm, it is cut into two equal parts. How much either [art can be stretched without breaking?

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25 m

1 mm

2 mm

0.5 m

Even the small viscosity of the air causes a retarding force on car at high speed is

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Small

Large

Very large

None of these

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

The acceleration due to gravity on a planet with mass and radium half that of earth will be

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g

2/g

12 g

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