A. The diagram shows a circuit diagram. Two meters are connected with the bulb. Which meter reads the current following? I mark Which meter reads the voltage across the bulb 1 mark Name the component labeled Q I mark B. The doorbell rines If either the front doorbell switch or back doorbell switch is pressed The circuit diagram and truth table for this is shown. Front Back Output switch (A) switch (B) (doorbell) 0 0 0 1 1 0 1 1 Dortell . Complete the truth table 4 marks Name the logic gate for your truth table 1 mark component The diagram shows a lightning circuit in a house Name the component X 1 mark 11. State the function of component X 1 A B D 230 V lamp Y III. 1 mark Which of the switches A-D controls lamp Y? 1 mark Lampy is connected to the 230 V supply and the current through it is 0.2 A. Calculate the power rating of the lamp IV 3 marks iv. The lamps are connected in parallel. Suggest a reason for connecting lamps in parallel but NOT in series
A. The diagram shows how radio-waves and microwaves behave as they move pas over a hill. All electromagnetic waves travel at a speed of 3x10m/s in air. Diagram 1 Diagram 2 microwaves radio waves i. Name the effect shown by the radio-waves in diagram 1 1 mark ii. Suggest a reason why the effect is NOT shown by the microwaves in diagram 2 1 mark iii. Which of the two electromagnetic waves shown above is used for the mobiles? 1 mark iv. State one electromagnetic wave that can be used for cooking 1 mark B. A radiowave has a wavelength of 1.5 x 102 m, Calculate its frequency.