Umangi Grover
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How many 176 ohm resistors (in parallel) are required to carry 5 A on a 220 V line?

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NCERT Solution for Class 10 Science Chapter 12
Electricity
NCERT Books for Session 2022-2023
CBSE Board and UP Board
Exercises Questions
Page No-221
Questions No-10

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1 Answer

  1. Let the total number of resistors be x.
    Given that: Current I = 5 A and Potential Difference V = 220 V
    According to Ohm’s law, V = IR
    ⟹𝑅=𝑉/𝐼=220/5=44 Ω
    Now for x number of resistors of resistance 176 Ω, the equivalent resistance of the resistors connected in parallel is 44 Ω.
    1/44= 1/176 +1/176 +1/176 + 1/176 +..𝑡𝑜 𝑥 𝑡𝑖𝑚𝑒𝑠 ⟹ 1/44=𝑥/176 ⟹𝑥=176/44=4
    Therefore, 4 resistors of 176 Ω are required to draw the given amount of current.

    For more answers visit to website:
    https://www.tiwariacademy.com/ncert-solutions/class-10/science/chapter-12/

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