Question

a) Three resistors of resistances, R1=10Ω, R2=5Ω, R3=20Ω are

connected in a circuit in such way that same amount of current

flows through them. Draw a circuit diagram showing the correct

connections of the three resistors, a cell of 2.5V, an ammeter and a

voltmeter across R3. Calculate the potential difference across R3.


b) Two wires of equal length, one of copper and other of manganin

(an alloy), have the same thickness. Which one will be used for i)

electrical transmission lines ii) electrical heating devices? Why?​

Answer 1

Refer to the attachment for the answers.

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