Home
Class 12
PHYSICS
Two electric bulbs marked 25W-220V and 1...

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

A

Both

B

100 W

C

25 W

D

Neither

Text Solution

Verified by Experts

The correct Answer is:
C
`R_1=(V_1^2)/(P_1)=((220)^2)/25=1936Omega`
`R_2=(V_2^2)/(P_2)=((220)^2)/100=484Omega`
Rated current, `i_1=P_1/V_1=0.1A,i_A=P_2/V_2=0.45A`
Current flow through the circuit
`i=(440)/(R_1+R_2)=0.2A`
as `i gt i_1` , bulb 25 W - 220V is fuse.
Promotional Banner

Similar Questions

Explore conceptually related problems

Two electic bulbs marked 25 W -220 V and 100 W - 220 V are connected in series to a 440 V supply. Which of the bulbs will fuse?

If two bulbs of 25 W and 100 W rated at 220 V are connected in series across a 440 V supply, will both the bulbs fuse ? If not which one ?

There are two electric bulbs rated 60W. 110V and 100W, 110V. They are connected in series with a 220V d.c. supply. Will any bylb fuse? What will happen if they are connected in parallel with the same supply?

There are two electric bulbs rated 60W. 110V and 100W, 110V. They are connected in series with a 220V d.c. supply. Will any bylb fuse? What will happen if they are connected in parallel with the same supply?

Two electric bulbs , rated at (25W,220V) and (100W,220V), are connected in series across a 220 V voltage source , if the 25W and 100W bulbs draw powers P_(1) and P_(2) Respectively , then :

Two electric bulbs rated 25 W , 220 V and 100 W , 220 V are connected in series across a 220 V voltage source . The 25 W and 100 W bulbs now draw P_(1) and P_(2) powers , respectively.

A 25W-120V bulb and a 100W-120V bulb are connected in series across 120V line. Which bulb will be brighter?