Question 1
State any one condition under which a pinhole camera may form an image on its screen which has the same size as the object
Answer
When the object distance from pinhole is equal to image distance
Question 2
State one detector of infrared radiation
Answer
Healing effect on skin
Question 3
It is observed that when a rod A is brought near the cap of a negatively charged electroscope, the divergence of the leaf decreases. State two deductions that can be made about rod A from the observation
Answer
The rod A is either
(i) Positively charged
(ii) neutral
(i) Positively charged
(ii) neutral
Question 4
The diagram below shows the trace signed on the CRO. Given that the time based is set at 100ms/div. Determine the frequency of the signal
Answer
Question 5
(a) Define the term biasing as used in electronics
b) The figure below shows a p-n junction diode. Complete the diagram to show the reverse bias state
Answer
(a) A method of establisging a set of currents or voltages at different points of an electronic circuit to establish properoperating conditions within an electronic component
b)
b)