2. Questions Bank
  3. 10th Class
  4. Science
  5. Electricity and Circuits

10th Class Science Electricity and Circuits Question Bank Electricity

  • question_answer
    You are given four bulbs of 25 W, 40 W, 50 W and 60 W. Which bulb has the lowest resistance?

    A) 25 W                                    

    B) 50 W                    

    C) 60 W                                    

    D) 40 W

    Correct Answer: C

    Solution :

    The resistance of high power devices is smaller than the low power ones. The resistance of 60 watt bulb is smaller than 40 watt bulb and so on. \[P=\frac{{{V}^{2}}}{R}\] For a given voltage, \[P\propto \frac{1}{R}\].So, 60W bulb has the lowest resistance.


You need to login to perform this action.
You will be redirected in 3 sec spinner