KEAM 2019 Physics and Chemistry Paper

A circuit with two resistances 3Ω and 1Ω are connected with 20V battery is as shown in figure belowSince resistors are connected in parallel, so each branch of the circuit has potential drop of 20V.
∴ Current in R1 resistor, I=‌

V

R1

=‌

20

3

A
∴ Heat developed in R1 is given by H=I2R1t where, t=1min=60s
where, t=1min=60s