Question

Study the circuit and find out:

1. Current in 12 ohm resistor.
2. Difference in the readings of ammeter A₁ and A₂ if any.

Answer 1

i. Effective resistance of two 24 Ω resistors in parallel.

`1/R = 1/24 + 1/24`

= `2/24`

`1/R = 1/12`

R = 12

So, total resistance

R_total = 12 + 12 = 24 Ω

Current in 12 Ω resistor = `V/R`

= `6/24`

= 0.25 A

ii. The readings of ammeters A and A are the same, both showing 0.25 A, so the difference is 0 A.