Question # 1

The vector is space has:

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One Component

Two Compnents

Three Components

Non of these

The density of water is 10³kg/m³. The water pressure on a submarine is 2.0 x 10⁷N/m². The depth of the submarine below the surface of the water, in maters, is approximately

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200 m

11000 m

2000 m

8000 m

Gaussian surface is always:

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Rectangular

Spherical

Cylindrical

Box shape

Any of these

The induced current in a conductor depends upon:

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Resistance of the loop

Speed with which the conductor moves

Any of these

Both A and B

None of these

A current of 1 ampere is passing through a conductor. The charge passing through it in half a minute s

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One coulomb

0.5 coulomb

30 coulombs

2 coulombs

None of these

In radio-active decay, the original element which disintegrate to another element is called

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element

daughter element

parent element

none of these

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

Particles have the mass smallest of following is:

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Electron

Proton

Neutron

Quark

When current passes through a solenoid coil, it behaves like a

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loop

circle

bar magnet

none of these

Conversion of A.C. into D.C. is called:

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Reftification

Amplification

Electric induction

Magnetic induction

None of these

The bridge circuit of full wave rectification uses

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one diode

two diode

three diode

four diode

A process is a reversible process, if the entropy of the system

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increases

decreases

remains constant

none of them

If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be

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Increasing by a factor of 2

Decreasing by a factor of 2

Decreasing by a factor of 4

Unchanged

When a platinum wire is heated, it appears orange red at

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500°C

900°C

1100°C

1300°C

The value of the input resistance of OP-AMP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several maga ohms

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

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nuclear fission

nuclear fusion

man defect

radioactivity

The lasing or active medium in He-Ne laser discharge tube is:

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Nitrogen

Helium

Hydrogen

Neon

None of these

The terms phase difference and path difference are:

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Same

Different

Equal

None of these

The induced current in the loop can be increased by:

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Using a strong magnetic field

Moving the loop faster

Replacing the loop by a coil of many turns

All of above

None of these

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

In L.C.R series A.C. circuit, the phase angle between current and voltage is

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Any angle between 0 and +π/2

π/2

π

Any angle between 0 andπ/2

The SI unit of magnetic induction is

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Gauses

Tesla

Weber

Weber²

Battery is charged in motor cars, which is based on

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Chemical effect

Magnetic effect

Electric effect

None

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 nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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3 more neutrons

3 more electrons

3 more protons

3 more ions

Gas constant per molecule is called:

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Universal gas constant

Stefen's constant

Boltzmann constant

Gravitation constant

To see the minor details of the object by microscope, it should have:

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High magnifying power

High resolving power

Am objective of larger focal length

None of these

Swimming is based on the principle of

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Newton's 1st law

Newton's 2nd law

Newton's 3rd law

All

Silicon can be obtained from:

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Lead

Uranium

An isotope of oxygen

Sand

Number of supplementary units are

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Three

Two

Seven

Five

The product of the pressure and volume of an ideal gas is

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A constant

Approximately equal to the universal gas constant

Directly proportional to its temperature

Inversely proportional to its temperature

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