Current Electricity and Electrical InstrumentHard

Question

A 100 W bulb B1, and two 60 W bulbs B2 and B3, are connected to a 250 V source, as shown in the figure. Now W1, W2 and W3 are output powers of the bulb B1, B2 and B3 respectively. Then,
    

Options

A.W1 > W2 = W3
B.W1 > W2 > W3
C.W1 < W2 = W3
D.W1 < W2 < W3

Solution

so,      
∴     and R2 = R3 =
Now,   
    and
    W1 : W2 : W3 = 15 : 25 : 64
or W1 < W2 < W3

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

The current i in the circuit (see figure) is :...In the following circuit the resultant e.m.f. between AB is :-...A certain metallic surface is illuminated with monochromatic light of wavelength, &#955;. The stopping potential for pho...Two sources of equal emf are connected to an external resistance R. The internal resistance of the two sources are R1 an...A wire has a non-uniform cross-section as shown in figure. A steady current flows through it. The drift speed of electro...