Question # 1

The gain of transistor amplifier depends upon

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Resistance connected with collector

Resistance connected with base voltage

Input voltage

Output voltage

When platinum is it becomes orange at

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500^oC

900^oC

1100^oC

1300^oC

The natural frequency of L.C circuit is equal to

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The relative permitivity of air is

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79.5

1.006

1.06

1.0006

A° is the unit of:

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Energy

Length

Nuclear energy

Work

The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (ρ) , in this region of space?

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ρ = 0

ρ decreases linearly in the direction of the electric field

ρ increases linearly in the direction of the electric field

ρ has a uniform value throughout the region

The winding of the electromagnet in motor are usually called.

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Magnetic coils

Field coils

Electric coils

electric o electric coils

The half life of radioactive elements depends upon

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Temperature

Nature of element

Amount of the radioactive substance

Pressure

Compton effect proves.

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Wave nature of radiation

Wave nature of particle

Dual nature of particle

Particle nature of radiations

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

Production of x rays is reverse process of

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Photo electric effect

Compton effect

An nihilation

Pair production

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

If D.C. input for step up transformer, the output is

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Zero

High

Low

May be high or low

The magnetic field inside solenoid is given:

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μ_∘nI²

μ_∘nI

μ_∘n/1²

μ_∘I/n

In case of A.C. through resistor V and I are

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At 0^o with each other

At 180 ^o with each other

At 90^o with each other

At 270 ^o with each other

One joule of energy absorbed per kilogram of a body is

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Roentgen

Grey

Rem

Curie

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

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