Question # 1

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

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

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

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K

K^-1

^oC

K^-2

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

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 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

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

Which one of the following bulbs has the least resistance.

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100 W

200 W

500 W

1000 W

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

In gas the charge carriers are:

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Electrons

Ions

Both a & b

None of above

The algebraic sum of potential change in a closed circuit is zero.

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Kirchhoff's 1st rule

Kirchhoff 2^nd rule

Krichoff's 3^rd rule

Kirchhoff 4^th rule

The heat produced by passage of current.

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H=I²Rt

H=IR2T

H=I/Rt

H=I²/Rt

The color code of "Green"

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8

3

5

7

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

mho -m-1 is the unit of.

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Resistance

Resistivity

Conductance

Conductivity

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

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None of above

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

The unit of temperature co efficient of resistivity is.

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Ohm -m

K-1

K

Ohm

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Physics FSC Part 2 Chapter 13 Online MCQ's Test MCQs With Answers

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