Question # 1

In a parallel resonant circuit, at resonance

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Current is maximum

Voltage is maximum

Impedance is minimum

Impedance is zero

The value of voltage or current that exists in a circuit at any instant of time measured from some reference point is its.

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Peak value

Peak to peak value

Instantaneous value

Average value

The output of a generator which uses a split ring commutator is.

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sinusoidal A.C. wave

Pulsating D.C. wave

Constant D.C Voltage

Linerly increasing voltage.

Which device converts alternating current to direct current.

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Motor

Generator

Transformer

Rectifier

The direction of electric field line surround the test charge -q id

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Parallel

Perpendicular

Radially outward

Radially inward

Electromotive force is closely related to.

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Inductance

Magnetic flux density

Potential difference

Electric field intensity

The direction of induced e.m.f in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

If we double both the current and the voltage in circuit while keeping its resistance constant the power.

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Remains unchanged

Halves

Doubles

quadruples

Two charged spheres are separated by 2 mm Which of the following would produce the greatest attractive force.

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+1 q and + 4 q

-1 q and -4 q

+2 q and +2 q

+2 q and -2q

A battery drives 50 C of charge round a circuit. The total work done is 750 J What is the electromotive force of the battery.

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0.07 V

15 V

700 V

1500 V

Which material has the highest magnetic susceptibility.

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Steel

Brass

Iron

Wood

Under which of the following conditions current in a circuit is wattles.

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When inductance in the circuit is zero

When resistance in the circuit is zero

When current is alternating

When resistance and inductance both are zero

It is sometimes necessary to protect electrical apparatus from magnetic field This can be done by surrounding the apparatus with a box made from.

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Aluminum

Iron

Steel

Rubber

The direction of induced emf during electromagnetic induction can be determined by making use of.

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Faraday's law

Ampere;s law

Lenz's law

Laplace law

For capacitors connected is series.

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The difference of potential is same for an

The charge on each is the same

The resultant capacitance is greater than

The charge on each is not the same

Two wires P and Q each of same length and the same material are connected in parallel to a battery The diameter of P is half that of Q What fraction of the total current passes through P.

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0.02

0.25

0.33

0.50

If a resistance is connected in parallel with a galvanometer the resulting instrument is called.

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A voltmeter

An ammeter

A wattmeter

A potentiometer

Which of the following is not a ferromagnetic materials.

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Iron

steel

Copper

Cobalt

The patch followed by charge in an electric field is.

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Circular

LInear

Parabolic

Zig zag

An A.C. dynamo operates on the principle of

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Mutual induction

Self induction

Electromagnetic induction

Mechanical induction

The electromagnetic waves propagated outing space from antenna of a transmitter are known as.

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Infrared waves

Light waves

Radio waves

X-rays

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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers

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