# Alternating Current -CBSE Class 12th NCERT Solution

Get, detailed solutions to the questions of the chapter Alternating Current from NCERT textbooks

Updated: Jun 5, 2018 11:00 IST Get, detailed solutions to the questions of the chapter Alternating Current from NCERT textbooks. The objective is to helping students regarding the pattern of answering the question as per the cbse latest marking scheme.Cbse.jagranjosh.com provided you NCERT solutions for classes 12th math and science subjects.

Some questions of this chapter are given here

Q. a) The peak voltage of an ac supply is 300 V. What is the rmsvoltage?

b) The rms value of current in an ac circuit is 10 A. What is the peak current?

Q. A 44 mH inductor is connected to 220 V, 50 Hz ac supply. Determine the rms value of the current in the circuit.

Q. In Exercises 7.3 and 7.4, what is the net power absorbed by eachcircuit over a complete cycle. Explain your answer.

Q. A radio can tune over the frequency range of a portion of MWbroadcast band: (800 kHz to 1200 kHz). If its LC circuit has an effective inductance of 200 μH, what must be the range of its variable capacitor? [Hint: For tuning, the natural frequency i.e., the frequency of free oscillations of the LC circuit should be equal to the frequency of the radio wave.]