Question # 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

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

The SI unit of resistivity is.

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Ohm m-2

Ohm m-1

Ohm m

Ohm

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

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None of above

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

If the resistance of 500 Ohm have fourth band of silver colour then its upper maximum resistance will be.

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600 Ohm

550 Ohm

450 Ohm

400 Ohm

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

Ampere second stands for the unit of.

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Charge

emf

energy

Power

The free electrons experience force.

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In direction of -E

In direction of E

Both A and B

All of the above

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

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

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

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140 J

1440 J

14400 J

144000 J

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