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The resistance $R_{t}$ of a conductor varies with temperature $t$ as shown in the figure. If the variation is represented by $R_{t} = R_{0} [1 + α t + β t^{2}]$ , then

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Important Questions on Electric Current and Circuits

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JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 7

The $V - i$ graph for a conductor at temperature $T_{1}$ and $T_{2}$ are as shown in the figure. $(T_{2} - T_{1})$ is proportional to

Question Image

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JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 8

A cylindrical conductor has a uniform cross-section. The resistivity of its material increases linearly from the left end to the right end. If a constant current is flowing through it and at a section distance

x

from the left end, the magnitude of electric field intensity is

E

, which of the following graphs is correct?

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 9

Dimensions of a block are

1 cm \times 1 cm \times 100 cm

. If specific resistance of its material is

3 \times 10^{- 7} Ohm - m

, then the resistance between the opposite rectangular faces is

EASY

JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 10

Dimensions of a block are

1 cm \times 1 cm \times 100 cm

. If specific resistance of its material is

3 \times 10^{- 7} Ohm - m

, then the resistance between the opposite square faces is

EASY

JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 11

A steady current flows in a metallic conductor of a non-uniform cross-section. The quantity/quantities constant along the length of the conductor is/are

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 12

A current

I

is passing through a wire having two sections

P

and

Q

of uniform diameters

d

and

\frac{d}{2}

, respectively. If the mean drift velocity of electrons in sections

P

and

Q

is denoted by

v_{P}

and

v_{Q}

, respectively, then

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JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 13

The length of the resistance wire is increased by

10 %

. What is the corresponding change in the resistance of the wire?

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JEE Main

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Chapterwise/Topicwise Daily Practice Problems (DPP) Electrostatics and Current Electricity JEE Main & Advanced>Chapter 5 - Electric Current and Circuits>DPP>Q 14

Which of the following characteristics of electrons determines the current in a conductor?

The resistance Rt of a conductor varies with temperature t as shown in the figure. If the variation is represented by Rt=R01+αt+βt2, then

Important Questions on Electric Current and Circuits

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The resistance $R_{t}$ of a conductor varies with temperature $t$ as shown in the figure. If the variation is represented by $R_{t} = R_{0} [1 + α t + β t^{2}]$ , then