Question 1
A plane mirror is suspended on a wall by a string shown in the diagram
An incident ray then strikes the mirror at an angle of 700. Determine the angle formed between the incident ray and reflected ray
Answer
Question 2
Give a reason why a prism disperses white light into the component colours
Answer
Each coloured light is refracted and deviated through a different angle
Question 3
Fig 2 below shows a conductor y placed in a magnetic field. The conductor carries a current flowing into the paper
a) Sketch the resultant magnetic field between the poles of the bar-magnet
b) Show on the diagram the direction of the force, F acting on the conductor
Answer
a)
b) The magnetic flux density on one side is greater than on the other
b) The magnetic flux density on one side is greater than on the other
Question 4
Determine the largest number of 75W bulbs which can be safely used to run on a 240V source with a 5A fuse
Answer
Question 5
A charge of magnitude 12 x 103 flows through a point in 15 minutes. Calculate the current
Answer
