Question # 1

At series resonance in L-C-R circuit the impedance is equal to.

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Ohmic resistance

Inductive reactance

Capacitive reactance

Inductive reactance minus capacitive reactance

The sensitivity of the galvanometer can be increased by increasing the

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Number of turns of the coil

Area of the coil

Strength of the magnetic field

All of the above

Work can be stored in an inductor as.

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Elastic P.E.

Electrical P;E.

Gravitational energy

K.E.

Relative permeability is

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The ratio of flux density in a material to that for a vacuum

Very large for paramagnetic materials

small for paramagnetic materials

None of these

The ratio of average induced emf to the rate of changing of current in the coil is called.

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Self induction

Mutual induction

Self inductance

Mutual inductance

The cause of production of eddy current is the

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Current flowing in a conductor

Current flowing in a insulator

Motion of a conductor in a varying magnetic field

Motion of an insulator in a varying magnetic field

What can be used as the unit of envery.

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N m-1

V A

W.s

V C-1

Electric field lines

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Start from a negative charge and terminal ate on a positive charge

Never cross each other

Always cross each other

Leaving a positive charge are not proportional to the maginitud of charge

The minimum value of charge on any object is.

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1.6 x 10^-29 C

1.6 x 10^-19 C

1.6 x 10^-9 C

1 C

Which method of charging is involved in making lightning.

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Induction

Friction

Contact

Convection

A number of spherical capacitors of different radii have same potentials The surface charge density on them

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I equal

Is proportional to their radii

Is inversely proportional to their radii

Is inversely proportional to square of their radii

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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers

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