Electricity Circuits and Their Components Class 7 Questions and Answers Science Chapter 3
Electricity Circuits and Their Components Class 7 Questions and Answers Science Chapter 3 1. Choose the incorrect statement. (i) A switch is the source of electric current in a circuit. (ii) A switch helps to complete or break the circuit. (iii) A switch helps us to use electricity as per our requirement. (iv) When the switch is in ‘OFF’ position, there is an air gap between its terminals. Answer: The incorrect statement is (i) A switch is the source of electric current in a circuit. 2. Observe Fig. 3.16. With which material connected between the ends A and B, the lamp will not glow? Answer: The lamp will not glow if an insulator like plastic, rubber, or glass is connected between ends A and B. 3. In Fig. 3.17, if the filament of one of the lamps is broken, will the other glow? Justify your answer. Answer: No, the other lamp will not glow. Justification: If the filament of one lamp is broken, the circuit becomes incomplete, stopping the flow of current, and thus the second lamp can...