Question # 1

Tolerance of "Gold" band.

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±10%

±5%

±15%

±20%

Magnetic effect of current is used

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To detect a current

To measure a current

In electric motor

All of above

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

Thermosouple is an arrangement of two different metals:

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Two convert heat energy into electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electrical energy into heat energy

Terminal potential difference is greater than emf of the cell when

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Circuit is open

Circuit is closed

small battery is charged by bigger battery

None of these

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

The current through a resistance of 100 Ohm when connecting across a source of 220 V is.

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22000 A

22 A

2.2 A

0.45 A

mho -m-1 is the unit of.

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Resistance

Resistivity

Conductance

Conductivity

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

Heat sensitive resistors are called.

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resistors

Capacitor

Thermistors

Inductors

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

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

The conventional current is due to the flow of

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Atoms and molecules

Positive charge

Negative charge

Bot (b) and (c)

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

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Mass

Charge

Energy

Momentum

When a wire is stretched and its radius becomes r/2, then its resistance will be

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16 R

4 R

2R

0

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