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Question 34: (a) With the help of a circuit diagram, obtain the relation for the equivalent resistance of two resistances connected in parallel. In the circuit diagram shown below, find : (i) Total resistance. (ii) Current shown by the ammeter A Lakhmir Singh Physics Class 10 |
| Answer» R = (R₁R₂)/(R₁ + R₂)or 1/R = 1/R₁ + 1/R₂Explanation:V = I₁R₁ => I₁ = V/R₁V = I₂R₂ => I₂ = V/R₂I = I₁ + I₂ => I = V/R₁ + V/R₂=> I = V ( 1/R₁ + 1/R₂)=> 1/ ( 1/R₁ + 1/R₂) = V/I=> R = 1/ ( 1/R₁ + 1/R₂) => R = (R₁R₂)/(R₁ + R₂) 1/R = 1/R₁ + 1/R₂ | |