Question # 1

A metal rod of 1 m is moving at a speed of 1 ms-1 in a direction making an angle 30^o with 0.5 T magnetic field . The emf produced is.

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0.25 N

2.5 N

0.25 V

2.5 V

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

For computation of electric flux, the surface area should be.

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Parallel

Flat

Curved

Spherical

A charged particle enters in a strong magnetic field its K.E.

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Remain constant

Increases

Decreases

Increases then decreases

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

The fraction change in resistance per Kelvin is known as:

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Temperature coefficient of Resistance

Coefficient of voltage of change

Thermal expansion

All of the above

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

EMF is induced due to change in

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Charge

Current

Magnetic flux

Electric field

LDR becomes necessary when op amp is used as a

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Night switch

Inverter

Comparator

Rectifier

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

The first theory about the structure of an atom was introduced by

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Neil Bohr

Einstein

Compton

Rutherford

Which one of the following paved the way for modern physics

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Newtonian mechanics

Theory of relativity

Quantum theory

All of above

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

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