Question

A 20 Ohm lamp and a 5 Ohm lamp are connected in series and placed across a potential difference of 50 V. What is the equivalent resistance of the circuit?

Answer 1

We know, in a series combination of electrical appliances, the equivalent resistance is equal to the some of all the resistances of the appliances.

R1=20 ohm

R2=5ohm

R=R1+R2

R=20+5

R=25 ohm

Hence, the equivalent resistance is 25 ohm.

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