Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 9

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IMPORTANT

Earn 100

The formula of resistivity $(ρ)$ is

100% studentsanswered this correctly

Important Questions on Current Electricity

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 10

A car headlight bulb working on a

12 V

car battery draws a current of

0.5 A

. The resistance of the light bulb is:

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 11

Ohm’s law gives a relationship between:

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 12

In the experiment studying the dependence of current $I$ on the potential difference $V$ , three students plotted the following graphs between $V$ and $I$ . The graph that is likely to be correct is/are:

Question Image

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 13

The diagram below shows part of a circuit:

If this arrangement of three resistors was to be replaced by a single resistor, its resistance should be:

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 14

A wire of resistance

R_{1}

is cut into five equal pieces. These five pieces of wire are then connected in parallel. If the resultant resistance of this combination be

R_{2}

, then the ratio

\frac{R_{1}}{R_{2}}

is:

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 15

If

n

identical resistor of resistance

R

are connected in series, then equivalent resistance would be—

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 16

What is the current in a circuit if the charge passing each point is

20 C

in

40 s

?

EASY

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 2 - Current Electricity>Exercise>Q 17

Which of the following equation shows the correct relationship between electrical units?

1 A = \frac{1 C}{s}

or

1 C = \frac{1 A}{s}