The diagram below shows the circuit that a student uses to find the resistance of a combination of three lamps.

The voltmeter and the ammeter have not been drawn in.

a. Copy the diagram and complete it by drawing in the voltmeter and the ammeter, using conventional symbols.

b. The student obtains these readings. current I = 0.54 A potential difference V = 1.8 V. 

Calculate the resistance R using the V equation R = V/I

c. The three lamps are now connected in parallel with one another. Draw a circuit diagram of the three lamps connected to the power supply. Include in your circuit diagram

i. An ammeter to record the total current through the lamps,

ii. A variable resistor to vary the brightness of all three lamp,

iii. A voltmeter to record the potential difference across the lamps.

Transcribed Image Text:

power Source