An electric bulb rated 50 mathrm{~W}-200 mathrm{~V} is connected across a 100 mathrm{~V} supply. The power dissipation of the bulb is :

Q: An electric bulb rated $50 \mathrm{~W}-200 \mathrm{~V}$ is connected across a $100 \mathrm{~V}$ supply. The power dissipation of the bulb is :

a Rated power $\&$ voltage gives resistance $\mathrm{R}=\frac{\mathrm{V}^2}{\mathrm{P}}=\frac{(200)^2}{50}=\frac{40000}{50}$ $\mathrm{R}=800$ $\mathrm{P}=\frac{\left(\mathrm{V}_{\text {applied }}\right)^2}{\mathrm{R}}=\frac{(100)^2}{800}$ $\mathrm{P}=12.5 \text { watt }$ Hence option $1$ is correct.

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

An electric bulb rated $50 \mathrm{~W}-200 \mathrm{~V}$ is connected across a $100 \mathrm{~V}$ supply. The power dissipation of the bulb is :

A$12.5 \mathrm{~W}$
B$25 \mathrm{~W}$
C$50 \mathrm{~W}$
D$100 \mathrm{~W}$

JEE MAIN 2024, Diffcult

STD 11 Science
NEET
STD 12 - 3. current electricity
Physics

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Download App

Similar Questions

1
In the given figure, battery $E $ is balanced on $55\, cm$ length of potentiometer wire but when a resistance of $10 \,\Omega$ is connected in parallel with the battery then it balances on $50\, cm$ length of the potentiometer wire then internal resistance $r$ of the battery is ............. $\Omega $
View Solution
2
Two bulbs of $(40 \;W, 200\; V)$ and $(100\; W, 200 \;V)$. Then correct relation for their resistance
View Solution
3
Kirchhoff's first law $i.e.$ $\Sigma i = 0$ at a junction is based on the law of conservation of
View Solution
4
$STATEMENT-1$ In a Meter Bridge experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance. and

$STATEMENT-2$ Resistance of a metal increases with increase in temperature.
View Solution
5
The potential difference between point $A$ and $B$ is ............. $V$
View Solution
6
Four equal resistance dissipated $5 \,W$ of power together when connected in series to a battery of negligible internal resistance. The total power dissipated in these resistance when connected in parallel across the same battery would be ........... $W$
View Solution
7
A resistance $R = 12\, \Omega$ is connected across a source of emf as shown in the figure . Its $emf$ changes with time as shown in the graph . What is the heat developed in the resistance in the first four seconds ? ............. $J$
View Solution
8
Potential difference across $A B$ in the network shown is .........
View Solution
9
The given figure shows $a$ network of resistances and $a$ battery. Identify the correct statement $(s)$
View Solution
10
In the figure given below, the current passing through $6\,\Omega $ resistor is ........... $ampere$
View Solution

Download our appand get started for free

Similar Questions

Download our app
and get started for free