36. What is the voltage across a circuit if the resistance is 5Ω and the current is 2A?
a) 3V
b) 10V
c) 7V
d) 2.5V
Answer: b) 10V
37. Which of the following is the correct symbol for electric current?
a) R
b) V
c) I
d) W
Answer: c) I
38. If the current in a circuit is halved while the voltage remains the same, what happens to the resistance?
a) It doubles
b) It halves
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c) It remains the same
d) It is impossible to determine
Answer: c) It remains the same
39. What is the resistance of a circuit if the voltage is 15V and the current is 5A?
a) 3Ω
b) 75Ω
c) 20Ω
d) 10Ω
Answer: a) 3Ω
40. Which of the following is the correct symbol for electric potential difference?
a) R
b) V
c) I
d) W
Answer: b) V
