Electricity
1. What is the unit of electric current?
a. Volt
b. Ampere
c. Ohm
d. Watt
2. Which particle flows to create electric current?
a. Protons
b. Neutrons
c. Electrons
d. Atoms
3. In which direction do electrons flow in a circuit?
a. From positive to negative
b. From negative to positive
c. Both directions
d. They do not flow
4. What is required for electric current to flow in a circuit?
a. Only a battery
b. Only a wire
c. A complete circuit
d. A resistor
5. What happens to the current when the resistance in the circuit increases?
a. Current increases
b. Current decreases
c. Current remains the same
d. Current stops
6. What does this symbol represent in a circuit:
a. Battery
b. Switch
c. Resistor
d. Lamp
7. Which of the following is the symbol for a battery?
a. Two parallel lines, one longer than the other
b. A circle with a cross inside
c. A zigzag line
d. A rectangle
8. How do you represent a lamp in a circuit diagram?
a. A zigzag line
b. A circle with an X inside
c. Two parallel lines
d. A rectangle
9. Which symbol is used for an ammeter in a circuit?
a. A inside a circle
b. V inside a circle
c. A zigzag line
d. A straight line
10. What is the purpose of a switch in a circuit?
a. To increase current
b. To stop or allow current flow
c. To store electrical energy
d. To convert electrical energy into light
11. Which device is used to measure electric current?
a. Voltmeter
b. Ohmmeter
c. Ammeter
d. Wattmeter
12. What is the correct position for an ammeter in a circuit?
a. In parallel with the component
b. In series with the component
c. Outside the circuit
d. It doesn't matter
13. What happens to the current in a series circuit?
a. It increases with each component
b. It decreases with each component
c. It remains the same throughout
d. It varies randomly
14. In a series circuit with two bulbs, if one bulb breaks, what happens to the other?
a. It gets brighter
b. It turns off
c. It continues to glow
d. It gets dimmer
15. What happens to the current when more cells are added in series?
a. Increases
b. Decreases
c. Stays the same
d. Stops
16. What happens to the current when more lamps are added in a series circuit?
a. Current increases
b. Current decreases
c. Current remains the same
d. Circuit breaks
17. Which of these happens if more cells are added in series?
a. The circuit overheats
b. The total voltage increases
c. The total voltage decreases
d. No effect
18. Which of the following is a conductor?
a. Rubber
b. Glass
c. Copper
d. Plastic
19. Which material is commonly used as an insulator?
a. Iron
b. Copper
c. Aluminum
d. Rubber
20. Which of the following is not a conductor?
a. Aluminum
b. Silver
c. Plastic
d. Gold
21. What is the purpose of an insulator?
a. To allow current to flow
b. To stop current flow
c. To increase resistance
d. To decrease resistance
22. Which of these materials would be best for making electrical wires?
a. Plastic
b. Wood
c. Copper
d. Rubber
23. Which of the following materials would be best to cover electrical wires?
a. Copper
b. Iron
c. Plastic
d. Aluminum
24. Which of the following is an example of an insulator?
a. Silver
b. Wood
c. Steel
d. Water
25. What does an insulator do in an electrical circuit?
a. Conducts electricity
b. Prevents electric shocks
c. Increases current
d. Stores energy
26. What happens if you touch a live wire with an insulator?
a. You get an electric shock
b. Electricity flows through you
c. Nothing happens
d. It depends on the insulator
27. Which of these materials would conduct electricity?
a. Wood
b. Glass
c. Water
d. Plastic
28. What is the main characteristic of a series circuit?
a. Current has multiple paths
b. Current has only one path
c. Voltage is the same across each component
d. It has a high resistance
29. What happens to the current if a short circuit occurs?
a. Current stops
b. Current increases significantly
c. Current remains the same
d. Current decreases
30. What does a voltmeter measure?
a. Current
b. Voltage
c. Resistance
d. Power
31. Which type of circuit has multiple paths for current to flow?
a. Series circuit
b. Parallel circuit
c. Short circuit
d. Closed circuit
32. What does an electric circuit need to be complete?
a. A battery
b. Wires
c. A closed loop
d. A switch
Short answers
1. How does electric current flow in a circuit?
2. What is the purpose of a switch in an electric circuit?
3. Describe the difference between a conductor and an insulator.
4. What happens to the current in a series circuit if more components are added?
5. How does the brightness of bulbs change when more bulbs are added in series?
6. What is the unit of electric current?
7. What rule applies to the current in a series circuit?
8. Why is copper commonly used for electrical wiring?
9. What is the function of an ammeter, and how is it connected in a circuit?
10. How do you draw a circuit diagram for a simple series circuit with a battery, switch,
and lamp?
11. How can you determine if a material is a conductor or an insulator?
12. Draw the symbols for a bulb, switch, ammeter, voltmeter, and battery, and describe
their functions.
