🔬 Chapter 4: Electricity – Magnetic and Heating Effects
Summary: This chapter explains the effects of electric current.
Electric current can produce heat and magnetic effects.
These effects are used in devices like heaters, bulbs, and electromagnets.
NCERT Questions & Answers
Q1. What is electric current?
Electric current is the flow of electric charge through a conductor.
Q2. What is heating effect of current?
When electric current passes through a wire, it produces heat.
Q3. What is magnetic effect of current?
Electric current produces a magnetic field around a conductor.
Q4. What is an electromagnet?
An electromagnet is a magnet formed by passing current through a coil.
Q5. Give examples of heating effect.
Electric iron, heater, and electric bulb.
Very Short Answer
1. Current → Flow of charge
2. Heating effect → Heat production
3. Magnetic effect → Magnetic field
4. Electromagnet → Current magnet
5. Device → Heater
Short Answer
Why are fuses used?
Fuses protect devices from excessive current.
How does an electromagnet work?
It works when current flows through a coil, creating a magnetic field.
Long Answer
Explain heating effect
When current passes through a conductor, it produces heat due to resistance.
Explain magnetic effect
Current flowing in a wire produces a magnetic field around it.