Question # 1

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

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

In gas the charge carriers are:

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Electrons

Ions

Both a & b

None of above

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

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

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

The conventional current is due to the flow of

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Atoms and molecules

Positive charge

Negative charge

Bot (b) and (c)

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

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

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