CIE iGCSE Co-Ordinated Science P4.2.3 Voltage (electromotive force and potential difference) Exam Style Questions Paper 2
Question
The electromotive force (e.m.f.) of a battery is 2.0V.
Which statement is correct?
(A) The battery supplies 0.50 J of energy for every 1.0 C of charge driven around a circuit.
(B) The battery supplies 0.50 J of energy for every 2.0 C of charge driven around a circuit.
(C) The battery supplies 2.0 J of energy for every 1.0 C of charge driven around a circuit.
(D) The battery supplies 2.0 J of energy for every 2.0 C of charge driven around a circuit.
▶️Answer/Explanation
Ans: C
Question
The potential difference (p.d.) across a 60 Ω resistor is 12V.
How much time does it take for a charge of 100 C to pass through the resistor?
(A) 0.0020 s (B) 0.050 s (C) 20 s (D) 500 s
▶️Answer/Explanation
Ans: D
Question
The electromotive force (e.m.f.) of a battery is 2.0 V. Which statement is correct?
A. The battery supplies 0.50 J of energy for every 1.0 C of charge driven around the circuit.
B. The battery supplies 0.50 J of energy for every 2.0 C of charge driven around the circuit.
C. The battery supplies 2.0 J of energy for every 1.0 C of charge driven around the circuit.
D. The battery supplies 2.0 J of energy for every 2.0 C of charge driven around the circuit.
▶️Answer/Explanation
Answer: C
Explanation: The e.m.f. of a battery is the energy supplied per unit charge. For a 2.0 V battery, it supplies 2.0 J of energy for every 1.0 C of charge driven around the circuit.