A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?

Related Mcqs:

1. Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ?

   A. 40 W bulb B. 60 W blub C. 100 W blub D. all will burn equally brightly...

2. An alternating current of the r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing a 10Ω resistor. The peak current is then ?

   A. 20A B. 20.66A C. 6.66A D. 5.66A...

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   IA. V = VR+VL+VC B. V2 = VR2+VL2+VC2 C. V2 = VR2+(VL-VC)2 D. V2 = VL2+(VR-VC)2...

5. Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?

   A. 40 W B. 90W C. 100W D. 120W...

6. A capacitor of capacitance 30µF is charged by a constant current of 10mA. If initially, the capacitor was uncharged what is the time taken for the potential difference across the capacitor to reach 300V ?

   A. 0.9sec B. 15 sec C. 1.5x105sec D. 0.9x102sec...

7. A 100µF capacitor with a 12V source in series having frequency 50Hz will offer a capacitive reactance of about______________?

   A. 32Ω B. 62Ω C. 50Ω D. 100Ω...

8. A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?

   A. 4 volt B. 5 volt C. 2 volt D. 0.4 volt...

9. Waves produced at the surface of water by a pencil executing vibrating motion if held vertically at a frequency of 50Hz are__________________?

   A. Longitudinal B. Transverse C. Periodic D. both A and C...

10. An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?

    A. 2KWh B. 20KWh C. 6KWh D. 12KWh...