Free School Management System
Free School Management SystemLearn More
SECTION A (25 Marks)Answer ALL questions
(a). The angle of incident is equal to the angle of reflection.√
(b). The incident ray, reflection ray and the normal at the point of incidence i.e on the same plane.√
(i) Coil is down and up on coil 2√
(ii) -Increasing amount of current.√
-Using a stronger magnet.√
To allow the omitted gases√ to escape.√
(a). A –metal cap√
B – metal rod/stem√
(b). To ensure uniform charge distribution.√
(a). To prevent charge leakage as a result of drought.√
-Applying a flame to the cap.
-Leaving it in the open air.
SECTION B (55 Marks)Answer ALL questions
(i) To create a north and south √ pole at the ends of the solenoid.
Or Opposite poles at ends√
(ii). -The sound from the microphone creates a varying current leading to a varying field in the solenoid√ due to the electromagnet√
-The varying, field cataracts the diaphram√ (magnetic alloy) at different degrees leading to vibration√
This vibration reproduces the speech in the receiver.√
(iii). -Replacing the iron with steel pole pieces leads to a permanent magnet being formed.
-There will therefore be no varying magnetic field hence causing the magnetic alloy to be attracted permanently√
- No vibration of the alloy means no sound reproduction.√
(a). –Imaginary lines drawn to join particles on wave which are in phase (moving in one step)√
ii). Waves are refracted away from the normal towards the earth.√
(c).i) -Alternate √maximum and minimum sound.√
ii) -Maximum sound due to constructive interference.√
-Minimum sound due to destructive interference.√
(iii). -Loud sound although.√