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 condition for the wheatstone bridge to be balanced is given by

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None of above

Drift velocity of electrons is.

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10^-1 m/s

10^-2 m/s

10^-3 m/s

10³ m/s

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

Heat energy is converted into electrical energy.

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Solar cells

thermocouples

Electric generators

None of above

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

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

The current flowing through each resistor of equal resistance in parallel combination is.

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Same

Different

Zero

Infinite

The resistivity of two wires isρ₁ andρ₂ which are connected in series. If there dimentions are same then the equivalent resistivity of the combination will be:

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(ρ₁ +ρ₂)

1/ρ₁+ 1/ρ₂

ρ₁+ρ₂/2

ρ_1/ρ₂

Colour codes are used to calculate the.

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Nature of resistor

Numerical value of resistance

Potential difference

Current

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

A wire uniform cross-section. A length L and resistance R is cut into two equal parts. The resistivity of each part will be:

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Doubled

Halved

Remain the same

One fourth

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

The product of resistance and conductance is

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1

Resistivity

Conductance

Zero

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

During electrolysis process, density of CuSO₄ solution

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Remains constant

Decreased

Increased

None of these

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

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

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

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