Question # 1

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

Mutual induction has a practical role in the performance of the.

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Radio choke

Transformers

A.C. Generator

D.C. Generator

The reactance of inductor depends upon

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L

All of the above

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

The illustration of the phenomenon of mutual induction is in the device of

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Transformer

Inductor

A.C. Generator

Ammeter

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

The reciprocal of decay construct lamda of a radioactive element is.

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Half life

Mean life

Curie

total life

When a motor is over loaded then the magnitude of back emf.

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Increases

Decreases

Remain constant

Zero

The basic circuit element in A.C. circuit which controls current.

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Resistor only

Capacitor only

Inductor only

All of these

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

In AC system we generate sine wave form because:

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It san be easily draw

It produces least disturbance in electrical circuits

It is nature standard

Other waves cannot be produced easily

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

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Chemical

Solar

Light

None of these

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

What is difference is isotopes

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Number of protons

Number of neutrons

Number of electrons

Charge number

The value of e/m is smallest for

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Proton

Electron

Beta particle

Positron

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

X_L=

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2πfL

1/2πfL

2πfL

fL/2π

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