WAEC Past Questions and Answers - Page 3316

16,576.
16,577.

A direct current of 5A flow through a 0.2H inductor. Calculate the energy stored in the inductor

A.

0.5J

B.

1.0J

C.

2.5J

D.

5.0J

Correct answer is C

P = \(\frac{1}{2} I^2 L\)

 = 5\(^2 \times\) 0.2 \(\times\) \(\frac{1}{2}\)

= 2.5J

16,579.

Fleming's right hand rule is also called the

A.

motor rule

B.

dynamo rule

C.

screw rule

D.

thumb rule

Correct answer is B

No explanation has been provided for this answer.

16,580.

The process by which the amount of water and solutes in the blood is controlled is known as 

A.

hemolysis

B.

diffusion

C.

turgidity

D.

osmoregulation

Correct answer is D

No explanation has been provided for this answer.