Question # 1

One use of a single p-n junction semiconductor in an electrical circuit is a

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Rectifier

Transistor

Battery

Diode

The magnitude of motional emf is given by

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The peak value of alternating current is 5√2 A. The mean square value of current will be:

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5A

2.5A

5√2A

5²

The anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

At high frequency, the current through a capacitor is

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Small

Infinity

Zero

Large

Balmer Empirical formula explains the electromagnetic radiation of any excited atom in terms of their.

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Energy

Mass

Wave length

Momentum

An expression for gain of an inverting amplifier is

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(R₁R₂)

None of these

Magnetism is related to:

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Stationary charges

Moving charges

Stationary & Movingcharges

Law of motion

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

Shear modulus is expressed as:

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G = tanθ/F/A

F/A/tanθ

F/tanθ

tanθ/A

Magnetic lines of force are.

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Imaginary

Real

Perpendicular

In phase with electric lines of force

Output resistance of an op amp is

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High

Low

Zero

Equal to input resistance

The solids are classified as

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Polymeric

Amorphous

Crystalline

All of above

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

Which of the following has least hysteresis loop area.

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Steel

Wrought Iron

Soft Iron

Cobalt

Conductors have conductivities of order:

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10³(Ωm)-1

10⁷(Ωm)^-1

10⁷Ωm^-1

10^-6Ω

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