Home
Class 12
PHYSICS
Two electric bulbs rated 25 W , 220 V a...

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

`P_1=16WP_2=4W`

B

`P_1=9WP_2=16W`

C

`P_1=16WP_2=9W`

D

`P_1=4WP_2=16W`

Text Solution

Verified by Experts

Let us assume `V_b=0V and V_a=xV`
`i_1+i_2+i_3=0`
`implies (x-E_1)/(2R_1)+(x=E_2)/R_2+(x-E_3)/(2R_1)=0`
`(x-2)/2+(x-4)/2+(x-4)/2=0`
`implies 3x-10=0 implies x=3.3V`
`V_a-V_b=x-0=3.3V`
Promotional Banner

Similar Questions

Explore conceptually related problems

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 :

A 25 W , 220 V bulb and a 100 W , 220 V bulb are connected in parallel across a 440 V line

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?

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 25 W, 220 V bulb and a 100 W , 220 V bulb are connected in series across a 220 V line , which electric bulb will glow brightly?

Two bulbs 60 W and 100 W designed for voltage 220 V are connected in series across 220 V source. The net power dissipated is

Two bulbs 25 W, 220 V and 100 W, 220 V are given . Which has higher resistance ?