Electric Current and Its Effects - Class 7 Science Workbook
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Q1 · MCQ · 1 mark
Which of the following materials is a good conductor of electricity?
Q2 · FILL · 1 mark
The effect of electric current used in an electric heater is the ____ effect.
Q3 · SHORT · 2 marks
What is a simple electric circuit?
Q4 · MCQ · 1 mark
Which device converts electrical energy into light energy?
Q5 · FILL · 1 mark
An electromagnet works on the principle of the ____ effect of electric current.
Q6 · SHORT · 2 marks
State one use of the heating effect of electric current.
Q7 · MCQ · 1 mark
Which component is used to break or complete an electric circuit?
Q8 · FILL · 1 mark
The SI unit of electric current is ____.
Q9 · SHORT · 2 marks
Briefly explain what an electromagnet is.
Q10 · MCQ · 1 mark
Which of these is a safety device used in an electrical circuit?