NCERT Solutions for Class 12 Physics Chapter 7

NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current chapter’s end Exercises Questions Answers and Additional Exercises Solutions in online mode as well as downloadable form free to use. Prepare for the exams using CBSE Sample papers based on new CBSE Curriculum 2018-19.



NCERT Solutions for Class 12 Physics Chapter 7

Go back to 12 Physics Main page

12 Physics Chapter 7 Exercises

NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current exercises are given below to use it online. Click here to see the Additional Exercises questions of this chapter or go to 12 Physics main page.
NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current




NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current in pdf form
NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current free download



NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current for +2 intermediate
NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current download free pdf

12 Physics Chapter 7 Additional Exercises

NCERT Solutions for Class 12 Physics Chapter 7 Alternating Current additional exercises are given below to use it online. Click here to see Exercises Questions or move to Top of the page or go to 12 Physics main page.
12 Physics Chapter 7 Alternating Current additional exercises



12 Physics Chapter 7 Alternating Current additional exercises answers in pdf free 12 Physics Chapter 7 Alternating Current additional exercises solutions in pdf free




12 Physics Chapter 7 Alternating Current additional exercises sols download
12 Physics Chapter 7 Alternating Current additional exercises in english medium 12 Physics Chapter 7 Alternating Current solutions




12 Physics Chapter 7 Alternating Current solutions in pdf form free
12 Physics Chapter 7 Alternating Current solutions download in pdf
12 Physics Chapter 7 Alternating Current solutions pdf



12 Physics Chapter 7 Alternating Current solutions all questions
12 Physics Chapter 7 Alternating Current solutions for up board



12 Physics Chapter 7 Alternating Current solutions for mp board
12 Physics Chapter 7 Alternating Current solutions cbse board free

Click here for Exercises Questions or Move to Top of the page or go to 12 Physics main page.

Previous Chapter: Electromagnetic Induction
Next Chapter: Electromagnetic Waves


Practice Questions
  1. The self inductance of the motor of an electric fan is 10H. What should be the capacitance of the capacitor to which it should be connected in order to impart maximum power at 50Hz?
  2. An applied Voltage signal consists of a superposition of DC Voltage and an AC Voltage of high frequency. The circuit consists of an inductor and a capacitor in series. Show that the DC signal will appear across C where as AC signal will appear across L.
  3. A sinusoidal e.m.f. device operates at amplitude E0 and frequency v across a purely (1) resistive (2) capacitive (3) inductive circuit. If the frequency of driving source is increased. How would (a) amplitude E0 and (b) amplitude I0 increase, decrease or remain same in each case?
  4. Write an expression for the force experienced by a charged particle moving in a uniform magnetic field B. With the help of diagram, explain the principle and working of a cyclotron. Show that cyclotron frequency does not depend on the speed of the particle.
  5. If the current sensitivity of a moving coil galvanometer is increased by 20% and its resistance also increased by 50% then how will the voltage sensitivity of the galvanometer be affected?
Try These
  • What is the magnitude of magnetic force per unit length on a wire carrying a current of 8A and making an angle of 30° with the direction of a uniform magnetic field of 0.15T?
  • A straight wire of mass 200g and length 1.5 m carries a current of 2A. It is suspended in mid-air by a uniform horizontal magnetic field B. What is the magnitude of the magnetic field?
  • In a series C–R circuit, applied voltage is V = 110 sin 314t volt. What is the (i) The peak voltage (ii) Average voltage over half cycle?
  • A power transmission line feeds input power at 2400 V to a step down ideal transformer having 4000 turns in its primary. What should be number of turns in its secondary to get power output at 240V?
  • A series C–R circuit consists of a capacitance 16 mF and resistance 8Ω. If the input a.c. voltage is (200 V, 50 Hz), calculate (i) voltage across capacitor and resistor. (ii) Phase by which voltage lags/leads current.