1 markVery Short AnswerSection SECTION-A

A charge of $150\text{ C}$ flows through a wire in one minute. Find the electric current flowing through it.

Electricity

Electric Current

Official Answer

The electric current flowing through the wire is $2.5\text{ A}$ .

I = Q/t60 seconds2.5 Aampere

Marking Scheme

1Conversion of time into seconds ( $1\text{ min} = 60\text{ s}$ ): 0.5 mark
2Correct formula and substitution: 0.5 mark
3Final answer with correct unit ( $2.5\text{ A}$ ): 0.5 mark

Hint

Convert the time from minutes to seconds ( $1\text{ min} = 60\text{ s}$ ) and use the formula $I = Q/t$ .

Quick Oral Answer

The SI unit of electric current is the Ampere (A), which is defined as the flow of one Coulomb of charge per second ( $1\text{ A} = 1\text{ C/s}$ ).

Analysis & Explanation

According to the definition of electric current, it is the rate of flow of electric charge through a cross-section of a conductor. Mathematically, $I = Q/t$ . Since the SI unit of time is seconds, we must convert $1\text{ minute}$ into $60\text{ seconds}$ before performing the calculation. Dividing $150\text{ C}$ by $60\text{ s}$ yields $2.5\text{ A}$ .

Common Mistakes

1Forgetting to convert time from minutes to seconds, leading to an incorrect current of $150\text{ A}$ .

Interesting Facts

An electric current of $1\text{ A}$ represents the flow of approximately $6.24 \times 10^{18}$ electrons passing through a cross-section of a conductor every second!

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2014?

This question carries 1 mark in the CBSE Class 10 Science 2014 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Electricity" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Electric Current" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2014 paper?

This is a Very Short Answer question from Section SECTION-A in the CBSE Class 10 Science 2014 paper.