JAMB Physics Past Questions & Answers - Page 124

616.

Two mirrors M1 and M2 are inclined at right angles as shown above calculate the angle of reflection of the ray of light at M2

A.

\( 30^{\circ} \)

B.

\( 45^{\circ} \)

C.

\( 60^{\circ} \)

D.

\( 90^{\circ} \)

Correct answer is C

No explanation has been provided for this answer.

618.

The diagram above shows a velocity time graph representing the motion of a car. Find the total distance covered during the acceleration and retardation of the motion

A.

75m

B.

150m

C.

300m

D.

375m

Correct answer is D

Total Distance covered is the Area of the Trapezium

Area of the Trapezium = \(\frac{1}{2}\) X ( sum of parallel sides ) X height

=  \(\frac{1}{2}\) X ( 30 + 45 ) X 10

: S = 375m

619.

PQRS is rectangular cell with PQ perpendicular to the magnetic field as shown above. If a current flows in the the direction PQRS in what direction will the coil move

A.

Upwards

B.

Downwards

C.

Towards The North Pole

D.

Towards The South Pole

Correct answer is A

No explanation has been provided for this answer.

620.

A capacitor of 10µF is connected across a cell of 12 volts as shown above, calculate the energy stored in the capacitor

A.

7.2 x 10-4J

B.

1.4 x 10-3J

C.

1.4 x 10-3J

D.

1.2 x 10-2J

Correct answer is A

No explanation has been provided for this answer.