Physics

Question 1

1A polythene rod rubbed with wool becomes negatively charged because it

Easy

A. loses protons B. gains protons C. gains electrons D. loses electrons

Question 2

2A charge of 5 μC experiences a force of 0.02 N. The electric field strength is

Hard

A. 0.0001 N/C B. 4,000 N/C C. 400 N/C D. 100 N/C

Question 3

3A magnet can be demagnetised by

Easy

A. keeping it with keepers B. heating it strongly or hammering it C. storing it in pairs D. painting it

Question 4

4Which material is magnetic?

Easy

A. wood B. copper C. aluminium D. iron

Question 5

5Which of these materials is strongly attracted by a magnet?

Easy

A. brass B. aluminium C. copper D. iron

Question 6

6Two negatively charged balloons are brought close together. They will

Easy

A. repel B. stick together C. not affect each other D. attract

Question 7

7A gold-leaf electroscope is used to

Easy

A. detect electric charge B. measure temperature C. measure current D. store electricity

Question 8

8The neutral point between two north poles facing each other is where

Hard

A. their fields cancel B. current flows C. south poles form D. the field is strongest

Question 9

9The magnetic poles of the earth are near the

Easy

A. oceans B. tropics C. geographic poles D. equator

Question 10

10Like charges

Easy

A. have no effect B. repel each other C. attract each other D. cancel out