7 A short circuit occurs when: A Current takes a path with very low resistance B Current stops flowing C Voltage is too high D The switch is open
10 The amount of electric charge flowing past a point per second is: A Current B Voltage C Resistance D Power
11 Which of the following is an example of a renewable energy source? A Solar power B Coal C Petroleum D Natural gas
12 The function of the earth wire in household wiring is to: A Protect from electric shock B Increase current C Decrease voltage D Complete the circuit
13 A material that has free electrons is likely to be: A A conductor B An insulator C A semiconductor D A superconductor
15 What is the flow of electric charge called? A Electric current B Electric voltage C Electric resistance D Electric power
16 A device that changes electrical energy into mechanical energy is a: A Motor B Generator C Battery D Bulb
17 What happens to the resistance of a wire as its length increases? A It increases B It decreases C It stays the same D It becomes zero
18 What happens to the current in a circuit if the resistance is increased? A The current decreases B The current increases C The current stays the same D The current becomes zero
20 What type of circuit allows current to flow through more than one path? A Parallel circuit B Series circuit C Short circuit D Open circuit
21 Which of the following materials is a good conductor of electricity? A Silver B Rubber C Plastic D Dry wood
22 What is the function of a switch in an electric circuit? A To control the flow of current B To produce current C To store charge D To increase resistance
23 A bulb in a circuit glows because of the: A Heating effect of current B Magnetic effect of current C Chemical effect of current D Static effect
24 Which of the following is a use of electromagnets? A All of these B Electric bells C Maglev trains D Speakers
25 Which of the following converts chemical energy into electrical energy? A Battery B Generator C Motor D Bulb