Practice over 4 Years of Physics Questions from WAEC and JAMB

Which of the following is the dimension of pressure?

a.

$ML^2T^{-3}$

b.

$MLT^{-2}$

c.

$ML^{-1}T^{-2}$

d.

$ML^{-3}$

A capacitor $8 μF$ , is charged to a potential difference of $100 V$ . The energy stored in the capacitor is

a.

$1.0 \times 10^4 J$

b.

$4.0 \times 10^{-2} J$

c.

$1.25 \times 10 J$

d.

$8.0 \times 10 J$

In a sound wave in air, the adjacent rarefactions and compressions are separated by a distance of $17 cm$ . If velocity of the sound wave is $340 ms^{-1}$ , determine the frequency.

a.

$10 Hz$

b.

$20 Hz$

c.

$5780 Hz$

d.

$1000 Hz$

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 signals a.c. 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