###### Alternating Current – Solutions

**1) A 100Ω resistor is connected to a 220 V, 50 Hz ac supply.**

**(a) What is the rms value of the current in the circuit?**

**(b) What is the net power consumed over a full cycle?**

Solution:

Given

Resistance of resistor, R = 100Ω

Root mean square voltage, v_{rms} = 220 volt

Root mean square (rms) value of current, I_{rms }=?

(a) I_{rms} = V_{rms}/R

= 220/100 = 2.2 A

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ShikshaHouse

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Class 12th Physics - 7 Alternating Current - NCERT Solutions

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