Question

How will you get the largest amount of energy from a resistance wire of length 0.5 m connected with a battery of negligible internal resistance?

• A. By joining the wire directly to battery
• B. By cutting the wire in two equal parts and then joining all of them in parallel to the battery
• C. By cutting the wire in four equal pieces and then connecting all of them in parallel to the battery
• D. By joining only half wire

Answer 1

Answer: (C)

By cutting the wire in four equal pieces and then connecting all of them in parallel to the battery

Answer 2

Source voltage is constant∴ H=$\frac{V^{2}t}{R}$or H ∝ $\frac{1}{R}$