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Electrical Comprehension
Practice Scenarios
Get a feel for the questions by taking a practice test below.
Question 1
How is the ammeter and voltmeter connected?
a) The ammeter is connected in series and the voltmeter is connected in parallel
b) Both the ammeter and voltmeter are connected in parallel
c) The voltmeter is connected in series and the ammeter is connected in parallel
Answer: A
Question 2
The lamp draws 0.45 A when the supply is 12 V. Find the resistance.
a) 2.67 Ω
b) 26.7 Ω
c) 5.4 Ω
Answer: B
Question 3
In the circuit diagram, if the current through resistor R is 5A and the current splits equally between A2 and A3, what is the reading on ammeter A1?
a) 5A
b) 10A
c) 2.5A
Answer: A
Question 4
What happens to resistance when switch closes?
a) Resistance decreases overall
b) Resistance increases overall
c) Resistance remains the same
Answer: A
Question 5
Which component dissipates most power closed?
a) Bulb C dissipates most
b) Bulb B dissipates most
c) Bulb A dissipates most
Answer: C