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PHYSICS [2 Mark Question Answer]

Electricity and Magnetism · ICSE STD 7 (ICSE - English Medium). 3 questions.

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[2 Mark Question Answer]

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3 questions · timed · auto-graded

Question 12 Marks
Define one ampere.
Answer
One ampere current is said to be flowing across a point if one coulomb of charge flows through it in one second.
1 ampere $=\frac{1 coulomb }{1 second }$
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Question 22 Marks
Why are free electrons called so ?
Answer
Atoms of most metals contain very loosely bound negatively charged electrons in their outermost orbits. These electrons can be knocked out easily and hence are called free electrons as these free electrons move randomly in all directions in a material.
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Question 32 Marks
What is meant by electromagnetism?
Answer
When an electric current is passed through a coil of insulated wire wound around a soft iron core, the core behaves like a magnet. This phenomenon is called electromagnetism.
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[2 Mark Question Answer] - PHYSICS STD 7 Questions - Vidyadip