Chapter 9: Electricity — Online MCQ Test
SCIENCE · Samacheer Kalvi 7th · Tamil Nadu State Board
Practice Chapter 9: Electricity with a free chapter-wise online MCQ test.
This chapter covers: Current circuit conductor insulator Electric circuits conductors insulators and everyday applications of electricity.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 9: Electricity — Important Questions & Answers
What is the continuous flow of electric charge in a circuit called?
- A. Electric current
- B. Static charge
- C. Magnetism
- D. Resistance
Answer: A. Electric current
Electric current is the flow of electric charge through a conductor in a closed circuit.
Electric current is the flow of electric charge through a conductor in a closed circuit.
Which of the following is a good conductor of electricity?
- A. Rubber
- B. Copper
- C. Plastic
- D. Wood
Answer: B. Copper
Copper allows electric current to pass through it easily, so it is a good conductor.
Copper allows electric current to pass through it easily, so it is a good conductor.
Which of the following will make a bulb glow in a circuit?
- A. An open switch
- B. A closed circuit
- C. A broken wire
- D. An empty battery holder
Answer: B. A closed circuit
A bulb glows only when the circuit is closed and current can flow through it.
A bulb glows only when the circuit is closed and current can flow through it.
A student connects a bulb, a cell, and wires, but the bulb does not glow. What is the most likely reason?
- A. The circuit may be incomplete
- B. The bulb is a conductor
- C. The wires are too long to carry current
- D. The cell always produces no current
Answer: A. The circuit may be incomplete
If the circuit is incomplete or broken at any point, current cannot flow and the bulb will not glow.
If the circuit is incomplete or broken at any point, current cannot flow and the bulb will not glow.
Which of the following is the best reason why a dry wooden stick can be handled safely near electricity, but a metal spoon cannot?
- A. Wood is a better conductor than metal
- B. Metal is an insulator and wood is a conductor
- C. Dry wood is an insulator and metal is a conductor
- D. Both wood and metal are conductors
Answer: C. Dry wood is an insulator and metal is a conductor
Dry wood does not allow current to pass easily, but metal does, so metal can cause electric shock.
Dry wood does not allow current to pass easily, but metal does, so metal can cause electric shock.