-
An energy meter connected to an immersion heater (resistive) operating on an AC 230 V, 50 H z, AC single phase source reads 2.3 units (kWh) in 1 hour. The heater is removed from the supply and now connected to a 400 V peak to peak square wave source of 150 Hz. The power in kW dissipated by the heater will be
-
- 3.478
- 1.739
- 1.540
- 0.870
Correct Option: B
Reading of Energy Meter = 2.3 Units (kWH)
| 2.3 × 103 = | = | × 1 | ||
| R | R |
⇒ R = 23 Ω
| ∴ Power dissipated in kW = | = | |||
| R | R |
| = | × 103 = 1.739 kW. | |
| 23 |
