Physics WAEC Past Questions

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231

Which of the following is a percussion instrument?

A. Flute
B. Organ
C. Bell
D. Piano
E. Sonometer

View Answer & Discuss (1) WAEC 1993

232

A short chain is usually attached to the back of a petrol tanker and trailing behind it so that the

A. petrol tanker is balanced on the road
B. heat generated by friction in the engine can be conducted to the earth
C. charges generated by friction in the tanker are conducted to the earth
D. tanker can move slowly as the chain touches the road surface
E. chain can produce sound in resonance with the noise from the tanker‘s engine

View Answer & Discuss (1) WAEC 1993

233

Which of the following indicates the correct sequence of steps taken in charging a gold-leaf electroscope by induction? l. Removing the ebonite rod ll. Bringing a negatively charged ebonite rod close to the cap III. Earthing the cap IV. Disconnecting the earthing