Alternating CurrentMedium

Question

In the circuit shown in figure, if both the bulbs B1 and B2 are identical :
                                                   

Options

A.their brightness will be the same   
B.B2 will be brighter than B1
C.as frequency of supply voltage is increased the brightness of bulb B1 will increase and that of B2 will decrease.
D.only B2 will glow because the capacitor has infinite impedance

Solution

IC =
Brightness of  B1 = IC2 R   
B1  = IC2 R
IL =
Brightness of B2 = IL2 R
B2  = IL2 R
here IL > IC     So, B2 will be brighter.

Create a free account to view solution

View Solution Free
Topic: Alternating Current·Practice all Alternating Current questions

More Alternating Current Questions

In an L-R series circuit (L = μH and R = 12Ω), a variable emf source (V = V0 sin ωt) of Vrms = 130 &#8730...In a transformer the primary has 500 turns and secondary has 50 turns. 100 volts are applied to the primary coil, the vo...A circuit has a resistance of 12 Ω and an impedance of 15 Ω. The power factor of the circuit will be...In a AC circuit the voltage and current are describedBy V = 200 sinvoltsBy i = 50 sin mA repectively. The average power ...By what percentage the impedance in an AC series circuit should be increased so that the power factor changes from (1/2)...