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Ashok0210
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Asked: 2021-03-05T05:37:06+00:00 In:

A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply. (a) What is the rms value of current in the circuit? (b) What is the net power consumed over a full cycle?

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Class 12 Physics
CBSE and UP Board
Alternating Current
Chapter-7 Exercise 7.1
Additional Exercise

NCERT Solutions for Class 12 Physics Chapter 7 Question 1

2020-2021cbse and up boardclass 12 chapter-7 physicsclass 12 physicsncert class 12 alternating current
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      Resistance of the resistor, R = 100 Ω,

      Supply voltage, V = 220 V,

      Frequency ,ν  = 50 Hz

      Ans (a).

      The rms value of current in the circuit is given as,

      I =V/R =220/100 = 2.20 A

      Ans (b).

      The net power consumed over a full cycle is given as :

      P = VI = 220 x 2.2 = 484 W

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