A transformer has an efficiency of 80% and works at 10 V and 4 kW. If the secondary voltage is 240 V, then the current in the secondary coil is: (a) 1.33 A (b) 13.33 A (c) 1.59 A (d) 15.1 A

Answer: (b). Pout = 0.8 × 4000 = 3200 W Is = (3200)/(240) ≈ 13.33 A So the answer is (b) 13.33 A.

A transformer has an efficiency of 80% and works at 10 V and 4 kW. If… | JEE Main 2024 (1 Feb, Shift 2)

Q21JEE Main 2024 · 1 FEB · SHIFT 2Easy

AC Generator & Transformer

A transformer has an efficiency of $80\%$ and works at $10\text{ V}$ and $4\text{ kW}$ . If the secondary voltage is $240\text{ V}$ , then the current in the secondary coil is:

Show answer and solution

Answer: (b)

$P_{out} = 0.8 \times 4000 = 3200\text{ W}$
$I_s = \dfrac{3200}{240} \approx 13.33\text{ A}$
So the answer is (b) 13.33 A.

Report a mistake

More questions on AC Generator & Transformer

If a transformer of an audio amplifier has output impedance 8000 Ω and the speaker has…MHT CET 2024 (16 May, Shift 2)
Alternating current of peak value (2/π) A flows through the primary coil of a…MHT CET 2024 (15 May, Shift 1)
Primary side of a transformer is connected to 230 V, 50 Hz supply. Turns ratio of primary…JEE Main 2024 (27 Jan, Shift 2)
A transformer having efficiency 90% is working on 200 V and 3 kw power supply. If the…MHT CET 2024 (3 May, Shift 1)
A power transmission line feeds input power at 2.3 kV to a step down transformer with its…JEE Main 2024 (30 Jan, Shift 2)
The coil of an a.c. generator has 100 turns, each of cross-sectional area 2 m². It is…MHT CET 2023 (9 May, Shift 1)
Match List - I with List - II: Choose the correct answer from the options given below…JEE Main 2023 (1 Feb, Shift 1)
In an ac generator, a rectangular coil of 100 turns each having area 14 × 10⁻² m² is…JEE Main 2023 (30 Jan, Shift 2)

AC Generator & Transformer question from JEE Main 2024 (1 Feb, Shift 2)

More questions on AC Generator & Transformer