Question # 1

The force experienced by charged particle is maximum, if it moves

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parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

An emf is set up in a conductor when it:

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is kept in a magnetic field

is kept in a electric field

Move across a magnetic field

Both (A) and (B)

None of these

The curve representing an adiabatic process is called

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isotherm

adiabat

adiable

none of them

The work done in moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body

Power

If 250V is the RMS value of alternative voltage, then its peak value V_owill be:

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353.5V

250V

175V

zero

400V

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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positive temperature

negative temperature

absolute temperature

zero temperature

A device used to measure the speed of liquid flow is known as

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barometer

speedometer

sphygmomanometer

venture-meter

The earth's potential is taken as

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Negative

Positive

Zero

Infinite

When the charged particle is projected at right angles to the field, then experienced by it will be:

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Maximum

Zero

qvB

Both (A) and (B)

Both (A) and (C)

According to the law of conservation of linear momentum, the total linear momentum of an isolated system

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increases

decreases with time

remains constant

none of them

The nucleus left after the emission of some radiation is called:

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Parent nucleus

Daughter necleus

Mother necleus

Any of these

None of these

The smallest three dimensional basic structure in a crystalline solid is called

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lattice point

crystal lattice

cubic crystal

unit cell

The number of protons inside a nucleus is called

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mass number

atomic weight

atomic number

none of these

The useful unit of angular replacement in SI unit is:

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Degree

Revolution

Radian

Metre

Significant figures in 0.0010 are:

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Four

Three

Two

One

Braking radiation causes:

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Continuous spectrum

Line Spectrum

Band spectrum

Discrete specturm

All of these

The wave form of SHM is

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Pulsed wave

Square wave

Triangular waved

Sine wave

Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:

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Is smaller than

Is greater than

Becomes equal to

None of these

When a mass attached to a spring begins to move left or right from the equilibrium position, its P.E.:

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Increases

Decreases

Remains constant

None of these

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)

When a body is vibrating, the displacement from mean position:

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Increases with time

Decreases with time

Changes with time

None of these

An electron of the hydrogen atom in the second orbit is called its:

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Ground state

Excited state

Ionized state

Any of these

None of these

When low energy photon interact with a metal,which of the following effect is likely to be taken place

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pair production

photoelectric

Compton effect

None of these

Electric generators which convert mechanical energy into

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solar energy

thermal energy

kinetic energy

electrical energy

When a water droplet falls through air, the net force on it is

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Net force = drag force - weight

Net force = weight - drag force

Net force = drag force + weight

Net force = weight + drag force

A fuse wire is having 5 ampere current rating. What is the peak value of current it can have?

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0.7074 A

7.07 A

0.0707 A

7.707 A

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

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Is associated with coil P

Is associated with coil S

Causes an induced current is coil S

All of these

None of these

The minimum charge on any object can not be less than

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1.6 x 10^-19C

3.2 x 10^-19C

1.0 C

4.8 x 10^-19C

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

Acceleration produced in a body by the force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

The practical application of the phenomenon of Mutual induction is

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Transformers

Generator

Motor

All of these

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