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)

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

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

When a wire of length 'l' and resistance R is cut into two equal parts then resistivity of each part.

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is doubled

Remains the same

Is halved

Is one fourth

An ideal current source shall have resistance

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Zero

Finite but not zero

Infinite

Depend upon requirement

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

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None of above

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

Resistance tolerance of silver band is.

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10%

6%

7%

5%

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

One ohm is equal to

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VC-1

CV-1

AC-1

VA^-1

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

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140 J

1440 J

14400 J

144000 J

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

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

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

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

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

In carbon resistors, then value of Blue colour is.

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6

7

8

9

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