Question:
Two bulbs marked 60 W, 220 V and 100 W, 220 V are connected in series and the series combination is now connected across a 220 V main supply. The power dissipiated in the circuit is
Two bulbs marked 60 W, 220 V and 100 W, 220 V are connected in series and the series combination is now connected across a 220 V main supply. The power dissipiated in the circuit is
Updated On: Jul 7, 2022
- 37.5 W
- 75 W
- 80 W
- 40 W
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The Correct Option is A
Solution and Explanation
When connected in series power dissipated
$\hspace15mm P_S= \frac {P_1P_2}{P_1+P_2} $
$\hspace15mm = \frac {100 \times 60}{100+60}= \frac {6000}{160}=37.5 W $
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Concepts Used:
Electromagnetic Induction
Electromagnetic Induction is a current produced by the voltage production due to a changing magnetic field. This happens in one of the two conditions:-
- When we place the conductor in a changing magnetic field.
- When the conductor constantly moves in a stationary field.
Formula:
The electromagnetic induction is mathematically represented as:-
e=N × d∅.dt
Where
- e = induced voltage
- N = number of turns in the coil
- Φ = Magnetic flux (This is the amount of magnetic field present on the surface)
- t = time
Applications of Electromagnetic Induction
- Electromagnetic induction in AC generator
- Electrical Transformers
- Magnetic Flow Meter