Ques.131. The hall effect is associated with
Ques.132. Three coils, each having a resistance of 10 ohms and an impedance of 0.02 H, are connected in star across a 440 V, 50 Hz, three-phase supply. What will be the line current?
- 25 A
- 25.4 A
- 0 A
- 25.51 A✓
Ques.133. In a three-phase load, ____ difference impedance are connected together in a star or delta fashion.
Ques.134. A device capable of detecting voltage, current, and the angle between the voltage and the current to provide power reading directly in watts is known as
- Power Factor
Ques.135. When the two quantities are in the quadrature, the phase angle between them will be______
Ques.136. The two-wattmeters method is used for the measurement of power in a three-phase balanced system, supplied from a 415 V, three-phase, 50 Hz supply. If the reading on both wattmeters is 8.5 kW, calculate the total power consumed.
- 2.36 kW
- 20 kW
- 22.2 kW
- 17 kW✓
Ques.137. A three-phase star-connected balance load of (4 − j3) Ω per phase is connected across a three-phase 50 Hz, 400V AC supply. Determine current drawn from the supply.
- 46.188 A✓
- 20.23 A
- 50.54 A
- 50.522 A
Ques.138. Alternating quantities of _____ frequencies can be represented in the same phasor diagram.
Ques.139. A thermocouple is used for measurement of____
Ques.140. The energy stored in a capacitor is given by___