Question # 1

Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?

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3 RΩ

2R /4Ω

R/3Ω

2R /3Ω

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

106 electrons are moving through a wire per second the current developed is:

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1.6 x 10-19 A

1 A

1.6 x 10-13A

106 A

Potentiometer is used to.

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Compare emf of two cells

Detect internal resistance of cell

Measure P.D.

All of these

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

Unit (S.I) of temperature coefficient of resistivity of a material is

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K

K^-1

^oC

K^-2

A substance having the negative temperature co efficient of resistivity out of the following is.

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Carbon

Iron

Tungsten

Gold

The resistivity of --------------------decrease with the increase in temp

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Gold

Silver

Copper

Silicon

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

Electric power:

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Vx1

V²x1

V/1

V/1²

Magnetic effect of current is used

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To detect a current

To measure a current

In electric motor

All of above

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

Kirchhoff's first rule is the manifestation of the law of conservation of.

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Mass

Charge

Energy

Momentum

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

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Physics ICS Part 2 Chapter 13 Online MCQ's Test MCQs With Answers

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