Question # 1

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

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None of above

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

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The unit of conductivity is:

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Ohm^-3m^-1

Ohm m^-1

Both a and b

Ohm m^-1

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

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

The unit of resistance is:

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Ω

Ωm

Ω^-1m^-1

Ωm^-1

Resistance tolerance for gold colour is.

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50%

30%

20%

5%

The fraction change in resistance per Kelvin is known as:

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Temperature coefficient of Resistance

Coefficient of voltage of change

Thermal expansion

All of the above

Calculate current in 2 2R /4Ω resistor.

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1 A

2R /4Ω

R/3Ω

2R /3Ω

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

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

If a charge Q flows through any cross section of the conductor in time t, the current I is

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I=Qt

Resistivity at a given temperature depends upon.

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Area of cross section

Length

Nature of material of conductor

Both length and area

For non-ohmic devices, the graph between V and I is

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Not a straight line

A straight line

A curve

All of above

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