Answer: Thick wire — because resistance decreases with increase in area.
Answer: ( H = I^2 R t = 5^2 \times 20 \times 30 = 25 \times 20 \times 30 = 15000 , \textJ )
Answer: ( R = V/I = 12 / (2.5 \times 10^-3) = 4800 , \Omega )
(a) 1/25 (b) 1/5 (c) 5 (d) 25 Answer: Each piece resistance = R/5. Parallel: 1/R' = 5/(R/5) → R' = R/25 → R/R' = 25 → (d)
Answer: Thick wire — because resistance decreases with increase in area.
Answer: ( H = I^2 R t = 5^2 \times 20 \times 30 = 25 \times 20 \times 30 = 15000 , \textJ ) class 10 electricity ncert solutions
Answer: ( R = V/I = 12 / (2.5 \times 10^-3) = 4800 , \Omega ) Answer: Thick wire — because resistance decreases with
(a) 1/25 (b) 1/5 (c) 5 (d) 25 Answer: Each piece resistance = R/5. Parallel: 1/R' = 5/(R/5) → R' = R/25 → R/R' = 25 → (d) class 10 electricity ncert solutions