(C) The formula for electrical energy $E$ consumed is given by $E = P \times t$,where $P$ is power and $t$ is time.Since power $P = \frac{V^2}{R}$,the

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

(C) The formula for electrical energy $E$ consumed is given by $E = P \times t$,where $P$ is power and $t$ is time.Since power $P = \frac{V^2}{R}$,the energy formula becomes $E = \frac{V^2}{R} \times t$.Given values are $V = 200\,V$,$R = 80\,\Omega$,and $t = 2\,h$.Substituting these values into the formula:$E = \frac{200 \times 200}{80} \times 2$$E = \frac{40000}{80} \times 2$$E = 500 \times 2 = 1000\,Wh$.

Class 12 Physics Current Electricity Electrical Energy and Power

Medium

$A$ hot electric iron has a resistance of $80\,\Omega$ and is used on a $200\,V$ source. The electrical energy spent,if it is used for two hours,will be ........... $Wh$.

A
$8000$
B
$2000$
C
$1000$
D
$800$

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Physics Questions

Chapter

Current Electricity

Subtopic

Electrical Energy and Power

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current?

Medium

View Solution

The number of electrons flowing per second in the filament of a $110 \,W$ bulb operating at $220 \,V$ is : (Given $e=1.6 \times 10^{-19} \,C$ )

DifficultJEE MAIN 2024

View Solution

$A$ bulb has a specification of $1\, kW$ and $250\, V$. The resistance of the bulb is .................. $\Omega$.

Easy

View Solution

$A$ rise of temperature of $4\,^oC$ is observed in a conductor by passing a current. If the current is tripled,the rise in temperature will be .............. $^oC$.

Medium

View Solution

Two electric lamps of $40\, W$ each are connected in parallel. The power consumed by the combination will be ........... $W$.

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

$A$ hot electric iron has a resistance of $80\,\Omega$ and is used on a $200\,V$ source. The electrical energy spent,if it is used for two hours,will be ........... $Wh$.

Similar Questions

Which of the following plots may represent the thermal energy produced in a resistor in a given time as a function of the electric current?

The number of electrons flowing per second in the filament of a $110 \,W$ bulb operating at $220 \,V$ is : (Given $e=1.6 \times 10^{-19} \,C$ )

$A$ bulb has a specification of $1\, kW$ and $250\, V$. The resistance of the bulb is .................. $\Omega$.

$A$ rise of temperature of $4\,^oC$ is observed in a conductor by passing a current. If the current is tripled,the rise in temperature will be .............. $^oC$.

Two electric lamps of $40\, W$ each are connected in parallel. The power consumed by the combination will be ........... $W$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module