Question 21 markVery Short AnswerSection SECTION-A

A charge of 150 C150\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 A2.5\text{ A}.

Answer keywords:I = Q/t60 seconds2.5 Aampere

Marking scheme

  1. 1.Conversion of time into seconds (1 min=60 s1\text{ min} = 60\text{ s}): 0.5 mark
  2. 2.Correct formula and substitution: 0.5 mark
  3. 3.Final answer with correct unit (2.5 A2.5\text{ A}): 0.5 mark

Hint

Convert the time from minutes to seconds (1 min=60 s1\text{ min} = 60\text{ s}) and use the formula I=Q/tI = 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 A=1 C/s1\text{ A} = 1\text{ C/s}).

Common mistakes

  1. 1.Forgetting to convert time from minutes to seconds, leading to an incorrect current of 150 A150\text{ A}.

Analysis and 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/tI = Q/t. Since the SI unit of time is seconds, we must convert 1 minute1\text{ minute} into 60 seconds60\text{ seconds} before performing the calculation. Dividing 150 C150\text{ C} by 60 s60\text{ s} yields 2.5 A2.5\text{ A}.

Interesting facts

An electric current of 1 A1\text{ A} represents the flow of approximately 6.24×10186.24 \times 10^{18} electrons passing through a cross-section of a conductor every second!

Question details

Q2 of 36 questions

Board
CBSE
Class
Class 10
Subject
Science
Year
2014
Section
Section SECTION-A
Marks
1
Type
Very Short Answer
Chapter
Electricity
Topic
Electric Current
Bloom's level
Apply
Syllabus topic
Electric current, potential difference and electric current.

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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.