1) What does I stand for in this formula triangle? a) Potential difference b) Current c) Voltage d) Resistance 2) Which VI graph is this? a) Filament lamp b) Diode c) Variable resistor 3) What is this symbol? a) lamp b) fuse c) diode d) battery 4) Which component made this V-I graph? a) filament lamp b) diode c) variable resistor 5) which equation is the correct one for calculating the potential difference? a) voltage = current x resistance b) voltage = current ÷ resistance c) voltage = resistance ÷ current 6) which are the correct units for resistance? a) amps b) volts c) ohms 7) which machine measures the potential difference? a) voltmeter b) ammeter 8) which machine measures the current? a) voltmeter b) ammeter 9) Which of these is NOT a step for measuring the resistance of a component? a) Plug the voltmeter in parallel to the component b) Plug the voltmeter in series c) Plug the ammeter in series to measure the current d) Calculate the resistance afterwards using the formula resistance = voltage ÷ current 10) On the Voltage-Current graph, which line would represent the highest resistance? a) A b) B c) C d) D 11) A potential difference of 12V and a current of 3A is measured in the circuit shown. Calculate the resistance. a) 4 Watts b) 4 Ohms c) 3 Ohms d) 3 Watts 12) The circuit is constructed with a resistance of 100 Ohms. The current is measured as 0.02A. What would the potential difference be? a) 5 KV b) 5 V c) 2 V d) 2 A

Voltage (pd) and Current Quiz

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