Current Electricity and Electrical InstrumentHard

Question

A 50 Ω bulb is in series with a room heater and the combination is connected across the mains. To get max. heater output, the 50 Ω bulb should be replaced by

Options

A.25 W
B.10 W
C.100 W
D.200 W

Solution


For power across heater is maximum resistance of balb should be minimum.
Pheader = RH
Rbulb is minimum for 200 W.

Create a free account to view solution

View Solution Free
Topic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions

More Current Electricity and Electrical Instrument Questions

n the box shown current i enters at H and leaves at C. If iAB = , iDC = , iHA = , iGF = , iHE = , Choose the branch in w...Two filaments of same length are connected first in series then in parallel. For the same amount of main current flowing...Figure shows a balanced Wheastone′s bridge...A bulb is connected to an ideal battery of emf 10 V so that the resulting current is 10 mA. When the bulb is connected t...The current i in the circuit (see figure) is :...