ICSE Class 10 Physics 2022 Solved Paper

In the above circuit diagram, calculate :

Question : 16

Total: 45

the external resistance of the circuit

Solution:

As, 12Ω and 8Ω are in parallel, so
‌‌

=‌

+‌

⇒‌‌‌

=‌

2+3

=‌

⇒‌‌RP=‌

=4.8Ω
Now, RP and 2Ω are in series, so
Req=4.8+2=6.8Ω

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