Test Index

WAEC Physics 2015 Paper

Question : 19

Total: 50

Solution:

Concept:

Apply Kirchhoff's voltage law: the total e.m.f. is equal to the sum of the potential differences around the loop.

Explanation:

From the diagram, the resistor

P

carries a potential difference of

14\text{ V}

The rest of the e.m.f. is across the parallel branch containing

Q

and

R

So,

V_Q = 24\text{ V} - 14\text{ V}

V_Q = 10\text{ V}

Because

Q

and

R

are in parallel, the voltage across

Q

equals the voltage across that branch.

Answer:

10\text{ V}

Go to Question:

Prev Question

Next Question