Question # 1

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 unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

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

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 --------------------decrease with the increase in temp

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Gold

Silver

Copper

Silicon

Kirchhoff's voltage rule is a way of stating conservation of.

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Mass

Charge

Energy

Momentum

Heat generated by a 40 W bulb in one hour is.

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140 J

1440 J

14400 J

144000 J

The condition for the wheatstone bridge to be balanced is given by

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None of above

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

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

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

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Mass

Charge

Energy

Momentum

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

Tolerance of "Gold" band.

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±10%

±5%

±15%

±20%

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/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

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