Question # 1

When certain area A is held parallel to the field lines, then:

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No lines cross this area

Maximum lines pass through this area

The number of lines are between zero and maximum

Both (A) and (B) correct

None of these

In a Milikian's oil drop experiment the charge on an oil drop is calculated to be 6.35 x 10^-19C. The number of excess electrons on the drop is

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3.9

4

4.2

6

In case of two identical charges placed certain distance apart, the electric field lines are:

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Straight lines

Sine curves

Curved

Both (A) and (B)

None of these

The SI unit of magnetic flux is

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NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

The arrangement or molecules or atoms in a crystalline solid can be studied by using:

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Chemical methods

Neutrons

X-ray techniques

Copper atoms

Both (A) and (B)

The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by

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Max plank

Newton

Einstein

J.J. Thomson

Watt x second is unit of:

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Force

Work

Power

None of these

The surface destiny of charge is defined is:

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Charge per volume

Mass per volume

Charge per area

Mass per area

Both (B) and (C)

A galvanometer is an instrument used to

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measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

Time period of simple pendulum is independent of

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length

mass

acceleration due to gravity

none of them

Two forces P and Q have a resultant Perpendicular to P.the angle between the forces is:

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tan^-1 (-P/Q)

tan^-1(P/Q)

sin^-1(P/Q)

cos^-1 (-P/Q)

The unit of Planck's constant h is same as that of

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Energy

Work

Linear momentum

Angular momentum

Suppose the water flows out from a pipe at 3 kgs^-1and its velocity changes from 5 ms^-1 to zero on striking the ball, then force is

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5.3 N

15 N

17.3 N

19.2 N

Multiplication of a vector is carried out by a

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Number

Direction

Number and direction

None of these

A bullet train move with the velocity of

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400 Kmh^-1

460 Kmh^-1

500 Kmh^-1

510 Kmh^-1

Which of the particles, electron, proton and neutron moving with same speed has longest wave length?

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Electron

Proton

Neutron

All have same

The angle with the horizontal at which an underwater swimmer will see the setting sun is

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91°

32°

49°

69°

The relative permitivity ∈_r for distilled water is

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2.9

1.0008

2.0

2.1

Time of flight of a body in projectile is the time in which a body

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Remains in the air

It reaches maximum height

The velocity becomes zero

None of these

The difference between C_pand C_vis equal to

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Universe gas constant

Plank's constant

Molar gas constant

Boltzmann constant

According to equation E = mc² Kg mass is actually the enrgy

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8 × 10¹⁵ J

9 × 10¹⁷ J

9 × 10¹⁶ J

8 × 10¹⁵ J

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