Question # 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)

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 conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

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

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Mass

Charge

Energy

Momentum

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 current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

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

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Same

Different

Zero

Infinite

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

When a pot difference of 4 volt is applied across resistance, 10 J of energy is converted Find charge flows

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0.20 C

2.5 C

5.0 C

10.0 C

A charged conductor has charge on its.

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Inner surface

Outer surface

Middle surface

Surrounding space

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

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

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K

K^-1

^oC

K^-2

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