CIE iGCSE Co-Ordinated Science P4.3.2 Series and parallel circuits Exam Style Questions Paper 2
Question
The circuit shown contains a battery, two resistors, a voltmeter and an ammeter.
One of the resistors has a resistance of 2.0 Ω. The reading on each meter is shown.
What is the potential difference (p.d.) across the battery?
(A) 3.0V
(B) 6.0V
(C) 8.0V
(D) 11V
▶️Answer/Explanation
Ans: D
Question
A circuit contains a cell and two resistors connected in parallel. The currents in each part of the circuit are labelled I$_{1}$, I$_{2}$ and I$_{3}$.
What is the relationship between the currents?
(A) I$_{1}$ = I$_{2}$
(B) I$_{1}$ = I$_{3}$
(C) I$_{1}$ > I$_{2}$ + I$_{3}$
(D) I$_{1}$ = I$_{2}$ + I$_{3}$
▶️Answer/Explanation
Ans: D
Question
A transformer with an efficiency of 100% has an input current of 10A. The input voltage is 100V and the output voltage is 20V.
What is the output current?
(A) 2.0A
(B) 10A
(C) 50A
(D) 200A
▶️Answer/Explanation
Ans: C
Question
Two resistors with different resistances are connected to a power supply. The resistors can be connected either in parallel or in series.
Which statement is correct?
(A) For resistors in parallel, the currents in the resistors are equal.
(B) For resistors in parallel, the potential differences (p.d.s) across the resistors are different.
(C) For resistors in series, the currents in the resistors are equal.
(D) For resistors in series, the potential differences (p.d.s) across the resistors are equal.
▶️Answer/Explanation
Ans : C