Quiz on Electricity and Circuits

1. Light bulb converts electrical energy into (i) chemical energy (ii) light energy (iii) heat energy Only (i) and (ii) Only (i) and (iii) Only (ii) and (iii) (i) 、 (ii) and (iii)

2. Which of the followings are the conditions for electricity to flow? (i)a source of electrical energy (ii)a light bulb (iii)a switch (iv)a closed circuit Only (i) and (ii) Only (i) and (iv) (i) 、 (ii) and (iii) (i) 、 (ii) 、 (iii)and (iv)

3.Conductors allow electric current to flow through. It is because they have a lot of neutrons. they have a lot of atoms. they have a lot of free electrons. they have a lot of protons.

4. The current flowing through a domestic washing machine is approximately 1A 2A 5A 10A

5. Which of the following is used to limit the size of current in a circuit? ammeter voltmeter resistor switch

6. Which of the following component in circuit allows us to vary the resistance? Ammeter Voltmeter Rheostat Switch

7. Which of the following is the symbol for a switch?

7. Which of the following has the smallest resistance? A piece of short and thick copper wire A piece of long and thick copper wire A piece of long and thick nichrome wire A piece of short and thin nichrome wire

8. Which of the following electrical devices should be connected in series? (i) ammeter (ii) voltmeter (iii) resistor Only (i) and (ii) Only (ii) and (iii) Only (i) and (iii) (i) 、 (ii) and (iii)

9. Which of the following about parallel circuit is NOT correct? There are 2 or more branches of electric current in a parallel circuit. Total current in the circuit equals to the sum of current in all branches. In a parallel circuit, if a bulb from one branch burns out, bulbs from other branches will not light up. In a parallel circuit, the electric current is larger in a branch with smaller resistance.

10. Which of the following is the hottest one when the same amount of current pass through them? A piece of short and thick copper wire A piece of long and thick copper wire A piece of long and thin nichrome wire A piece of short and thin nichrome wire

11. Which of the following electrical appliance is NOT making use of the heating effect of electric current? Rice cooker electric heater Heat plate electric doorbell

Which of the following acts like a fuse to protect the circuit and prevent overloading ? rheostat switch Circuit breaker ammeter