arrow
arrow
arrow
A 2200 W electric toaster operates at 220 V. The resistance of its coil is:
Question

A 2200 W electric toaster operates at 220 V. The resistance of its coil is:

A.

44 Ω

B.

22 Ω

C.

88 Ω

D.

11 Ω

Correct option is B

To find the resistance of the coil, we can use the formula derived from Ohm's law and the power formula:
P=V2RP = \frac{V^2}{R}​​
Where:
· P is the power (2200 W),
· V is the voltage (220 V),
· R is the resistance (which we need to find).
Rearranging the formula to solve for R:
R=V2PR = \frac{V^2}{P}​​
Substituting the given values:

R=22022200R= \frac{220^2}{2200}

R=484002200=22 Ω R = \frac{48400}{2200} = 22 \, \Omega​​​
So, the resistance of the coil is 22 Ω.
Thus, the correct answer is (b) 22 Ω.

Free Tests

Free
Must Attempt

CBT-1 Full Mock Test 1

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

RRB NTPC Graduate Level PYP (Held on 5 Jun 2025 S1)

languageIcon English
  • pdpQsnIcon100 Questions
  • pdpsheetsIcon100 Marks
  • timerIcon90 Mins
languageIcon English
Free
Must Attempt

CBT-1 General Awareness Section Test 1

languageIcon English
  • pdpQsnIcon40 Questions
  • pdpsheetsIcon30 Marks
  • timerIcon25 Mins
languageIcon English
test-prime-package

Access ‘RRB Group D’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
354k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow