3 Which symbol represents a cell in a circuit diagram? A Zigzag line B Long and short parallel lines C Circle with a cross D Straight line
4 Which of the following reduces the risk of electric shock? A Wet floor B Insulated wires C Broken plug D Overloading
6 When cells are connected in series, the total EMF is: A Average of EMFs B Difference of EMFs C Sum of EMFs D Product of EMFs
9 When identical cells are connected in parallel, the total EMF is: A Zero B Equal to one cell C Double D Half
10 Ohm’s law states that current is directly proportional to: A Resistance B Voltage C Power D Energy
12 The material used for making fuse wire should have: A High melting point B Low melting point C High resistance D Low resistance
14 Which wire in household circuits carries current to the appliance? A Earth wire B Neutral wire C Live wire D Ground wire
16 Which graph represents Ohm’s law? A Current vs Resistance B Voltage vs Resistance C Current vs Voltage D Power vs Voltage
17 Which factor increases electric power? A Decrease in voltage B Decrease in current C Increase in voltage D Increase in resistance
19 Which quantity remains the same across each branch of a parallel circuit? A Current B Resistance C Voltage D Power
20 Electricity is widely used because it is: A Expensive B Difficult to control C Easy to transmit D Dangerous