Question # 1

The concept of field theory was put forward by

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Franklin

Kepler

Oersted

Michael Faraday

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

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Motion emf

Electrostatic emf

Induced emf

Both A and B

Both A and C

The ratio of the gravitational force F_gto the electrostatic force F_ebetween two electrons at the same distance apart is approximately

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9.8

24 x 10¹⁹

24 x 10⁴²

24 x 10^-44

When two spherical conducting balls at different potentials are joined by a metallic wire, after some time:

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Both the conductors are at the same potential

Potential difference across the conductors remain constant

Potential difference across the conductors becomes zero

Both (A) and (B)

Both (A) and (C)

The greatest stress that a material can endure without losing the proportionality between stress and strain is called

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plastic line

breaking point

proportional limit

none of them

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

One newton is a force that produces an acceleration of 0.5 m/sec²in a body of mass:

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2 Kg

3 Kg

4 Kg

8 Kg

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

In order to produce pair production, a photon must have a energy

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0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

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transformer

rectifier

filter

none of these

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

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10 m/sec2

20 m/sec2

30 m/sec2

Zero

Machine parts are jammed due to:

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Increasing in viscosity of lubricant

Decreasing in viscosity of lubricant

Decreasing in surface tension of lubricant

None of these

If the distance between two charges is doubled, the force between them will become:

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Double

Half

Three times

One fourth

One third

Radioactivity was discovered by

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Rutherford

Henri Becqureal

Maxwell

James Chadwick

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

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0.52 A

1 mA

0.7 mA

1.4 A

A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is

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Two

1/2

Zero

3/2

Change in momentum is one second called.

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Impulse

Force

Energy

Work

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

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Sensitive

Accurate

Stable

None of these

1 amu is equal to

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1.66 x 10^-24kg

1.66 x 10^-19kg

1.66 x 10^-34kg

1.66 x 10^-27kg

Truth table of logic function:

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Summarizes its output values

Tabulates all its input conditions only

Display all its input/output possibilites

Is not based on logic algebra

None of these

Alfa particles are

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hydrogen nuclei

helium nuclei

electrons

photons

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

How much time, theα-particle more massive than an electron

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600

7000

5000

15000

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

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Q/4πr²

2Q/4πr²

Q.d

Zero

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

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deuteron

deterium

protium

tritium

A body moving with an acceleration of 5 m/sec²started with velocity of 10 m/sec. What will be the distance traversed in 10 seconds?

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150 m

250 m

350 m

400 m

A field free region is found:

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Near the outer surface of a hollow charged metal sphere

In the interior of solid metal uncharged sphere

In the interior of solid metal charged sphere

Both (A) and (B)

Both (A) and (C)

The power factor of resonant series circuit is

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1

0

-1

0.5

At the temperature, a body emits radiation which is principally

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of long wavelengths in the visible region

of long wavelengths in the invisible infrared region

of short wavelength in invisible ultraviolet region

none of these

The unit of thermodynamical scale is

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centigrade

fahrenheit

kelvin

none of them

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