Question

Three resistors are connected to a cell of potential difference 12V as shown in
this diagram,
Calculate,
(i) the total current.
(ii) the voltage across 2 Ω resistor.

Answer 1

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Answer 2

Answer:

Given , V = 12

We find,

(i) the total current.

(ii) the voltage across 2 Ω resistor.

So, firstly we find total resistance in the circuit

From the diagram two resistance are connected in parallel.

Rp = 4/2 = 2Ω

And then this resistance are connected with one resistance in series

Rs = 2Ω + 2Ω = 4Ω.

By ohms law,

I =V/R

I = 12/4

I = 3A

(ii) Now, we find Potential difference across 2Ω Resistance.

2Ω resistor is connected in series.

Therefore , current is same , i.e., 3A

Resistance = 2Ω

By ohms law,

V = IR

V = 3×2

V = 6v

Hope it helps you.