Question # 1

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

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

Semiconductor diodes are called:

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Ohmic

non ohmic

Both a & b

none of above

Electric power:

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Vx1

V²x1

V/1

V/1²

The thermistors convert changes of temperature into.

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Light energy

Electric voltage

Heat

Sound

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

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None of above

The powers of two electric bulbs are 100w and 200w. Which are connected to power supply of 220 V. The ratio of resistance of their filament will be:

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1:2

2:1

1:3

4:3

What is the resistance of carbon resistor which has band brown black brown.

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100 Ohm

1000 Ohm

10 Ohm

1.0 Ohm

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

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The reciprocal of resistance is called.

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Capacitance

Resistance

Conductance

Inductance

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

Seven resistances are connected as shown in the figures . THe equivalent resistance between A and B is:

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3Ω

4Ω

4.5Ω

5Ω

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