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 ?

Related Mcqs:

1. There are three bulbs of 60W 100W and 200W which bulb has thickest filament ?

   A. 100W B. 200W C. 60W D. all...

2. 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 ?

   A. 220V B. 220/ 2V C. 110V D. 220 √2V...

3. 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...

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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. If a glass plate is inserted in between the plate of a capacitor in series with a lighted bulb the brightness of the bulb________________?

   A. Remains same B. Brightness increases C. Brightness decreases D. No light...

6. Which one of the following bulbs has the least resistance ?

   A. 100 watt B. 200 watt C. 300 watt D. 60 watt...

7. When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?

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8. Which one of the following materials is useful for making bulb filaments ?

   A. constantan B. nichrome C. copper D. tungsten...

9. How much heat does a 40 W bulb generates in one hour ?

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10. The consumption of energy by a 60 watt bulb in 2 sec is_________________?

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