Question

Two resistors of resistances 10 ohm and 20 ohm are joined in series. a potential difference of 12 volt is applied across the combination. find the power consumed by each resistor

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Answer 1

Answer:

             

Given that 2 resistors of 10 ohm and 20 ohm are connected in series. 

Total resistance (R) = R₁+R₂ = 10+20 = 30Ω

Potential difference (V) = 12v

Power consumed (P) = ?

From ohms law, V = iR                           

i = V/R ----- 1

We know that, P = iV

From 1,          

P = V²/R

Placing the given values in the formula                       P = 12 x 12 / 30                     

 . P = 4.8 w

Therefore, Power consumed = 4.8 watts .

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