Page 7 - X-CBW-ELECTRICITY
P. 7
i) How are the LEDs connected in the circuit diagram?
(ii) If the LED marked 'LED 2' in the diagram stops working which other LEDs
will also stop working?
(iii) Suresh decided to connect all the LEDs in his lights in a series
combination. How many LEDs will he need to connect if he is going to
connect the lights to 240 V mains supply so that the LEDs work at their
power rating?
(iv) What will happen if he connects 100 LEDs, all in parallel combination to
the 240 V mains supply?
(v) How much current is each LED expected to draw when used according to
the ratings given in the label?
