Physics · 2026
JEE Main · 22 January 2026, Shift 2 · Q38
An electric power line having total resistance of 2 Ω, delivers 1 kW of power at 250 V. The percentage efficiency of transmission line is ____.
An electric power line having total resistance of $\displaystyle 2 \Omega$, delivers $\displaystyle 1$ kW of power at $\displaystyle 250$ V . The percentage efficiency of transmission line is $\displaystyle \_\_\_\_$.
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 96.9$
More from Current Electricity
- Refer to the circuit diagram given below. The heat generated across the 6 Ω resistance in 100 second is (α)/100 J. The value of α is ____. (Nearest…2026
- When an external resistance of 5 Ω is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5 Ω resistor is replaced…2026
- The voltage and the current between A and B points shown in the circuit are ____.2026
- Two cells of emfs 1 V and 2 V and internal resistance 2 Ω and 1 Ω, respectively connected in parallel, gave a current of 1 A through an external…2026
- Refer to the figure given below, current between terminals A and B is ____ A.2026
- Refer to the figure given below. The values of I_1, I_2 and I_3 are ____.2026
- Two resistors of 200 Ω and 400 Ω are connected in series with a battery of 100 V. A bulb rated at 200 V, 100 W is connected across the 400 Ω…2026
JEE Main 2026 Physics question, with the answer from NTA’s final answer key. Where our answers come from.