Q.1. True/False
(i) The human body is a good conductor of electricity.
(ii) An incandescent lamp will not glow if connected with the wrong terminals.
(iii) Circuit diagrams use symbols to show real components in a circuit.
(iv) A battery produces alternating current (AC).
(v) LEDs can work even if the positive and negative terminals are reversed.
Q.2. Fill in the blanks.
(i) Longer line in the symbol for a cell represents its ____ terminal.
(ii) The combination of two or more cells is called a ____.
(iii) When current is switched ‘on’ in a room heater, it ____.
(iv) The safety device based on the heating effect of electric current is called a ____.
Answer the following Questions
Q.3. What is electric current?
Q.4. Write some uses of battery.
Q.5. What is filament?
Q.6. What are the uses of heating effect of electric current?
Q.7. Name any two effects of electric current.
Q.8. What is an electric circuit?
Q.9. Explain the symbol of electric cell.
Q.10. Why a fused bulb does not glow?
Q.11. Sometimes the cells are placed side by side. Then how are the terminals of the cells connected?
Q.12. What is a switch, and how does it control an electric circuit?
Q.13. Explain the importance of circuit diagrams and list three symbols used.
Q.14. Describe the difference between an incandescent lamp and an LED.
Q.15. What are conductors and insulators? Give examples and their uses.
You can find Worksheets Solutions here: Worksheet Solutions: Electric Current and Its effects