Question 1
Figure 1 below shows an incident ray and reflected ray on a plane mirror
The mirror is rotated clockwise through an angle of 150 about point O. What will be the angle between the two rays
Answer
New glancing angle = 350
Total glancing angle = 700;
Angle between rays = 180 – 70 = 1100
Total glancing angle = 700;
Angle between rays = 180 – 70 = 1100
Question 2
Figure 2 below shows part of a circuit containing two capacitors of 4μF and 6μF respectively
Determine the p.d across AB given that the total charge stored in the two capacitors is 0.000001C
Answer
Question 3
A student was investigating the brightness of bulbs when setup in an electric circuits. She used identical bulbs and cells. The circuits shown in figure 3(a) and (b) were what she setup.
Which setup was the bulb brightest? Give a reason for your answer.
Answer
Bulb brightest in (b);
Total resistance is less hence higher current flows than in circuit (a);
Total resistance is less hence higher current flows than in circuit (a);
Question 4
A piece of resistance wire, was connected in a circuit as shown in figure 4(a) and figure 4(b).
Determine the resistance of the wire
Answer
Question 5
Figure 5 below shows how the displacement varies for a certain wave
Determine the frequency of the wave
Answer
