Physics 2018 Waec Past Questions and Answers

Question 41 :

• WAEC 2018

The diagram above illustrates the wire connections to a three-pin plug. The wires P, Q and R respectively are:

A. Live, neutral and earth
B. Neutral, earth and live
C. Earth, live and neutral
D. Earth, neutral and live

Question 42 :

• WAEC 2018

Which of the following statements about parallel plate capacitors is/are correct?
I. Capacitance of the capacitor is inversely proportional to the distance between the plates
II. Capacitors can filter a.c signals from d.c
III. Capacitors can store charges

A. I only
B. I and II only
C. II and III only
D. I, II and III

Question 43 :

• WAEC 2018

The circuit contains three ammeters A1, A2 and A3 with readings of A2 and A3 shown as indicated in the diagram. Determine the reading of A1.

A. 2A
B. 3A
C. 5A
D. 8A

Question 44 :

• WAEC 2018

Which of the following statements about magnetic lines of force is not correct? They

A. Pass through even non-magnetic materials
B. Run from the north pole to the south pole
C. Are in a state of tension and tend to be shorted
D. Intersect one another

Question 45 :

• WAEC 2018

In which of the following activities is an induction coil not useful?

A. Investigation of high voltages
B. Study of electric discharge
C. Operation of X-ray tubes
D. A.C. power transmission