Physics
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?

25 W
100 W
Neither
Both

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Physics
In a bipolar junction transistor

The collector has the least concentration of impurity
All the three regions (the emitter, the base and the collector) have equal concentrations of impurity
The base has the least concentration of impurity
The emitter has the least concentration of impurity

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Physics
The earth is a

Bad absorber and bad radiator of heat
Good reflector of heat
Non-absorber of heat
Good absorber and good radiator of heat

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