12th Physics Chapter 16 Notes

Important Very easy and understandable Notes of Physics of 12th Physics Chapter 16 Notes written by Professor Mr. Asad Abbas Suib. These notes are very helpful in the preparation of 12th Physics Chapter 16 Notes for students of the 12th class and these are according to the paper patterns of all Punjab Book Boards.

Summary and Contents:
Topics which are discussed in the notes are given below:
  • Important 12th physics chapter 16 exercise for Intermediate part-II students.
  • Definition of Alternating Current
  • Why AC is widely used?
  • Main common source of AC voltage
  • Definition of  Time period of AC
  • Definition of  Frequency of AC
  • Definition of  Instantaneous value of AC
  • Important 12th class  physics chapter 16 notes for Intermediate part-II students.
  • What are the basic elements of AC & DC circuits?
  • AC through Resistor
  • Explain the behavior of AC through capacitor?
  • Explain the behavior of AC through Inductor?
  • What is Impedance. Write its formula and unit.
  • Important 12th class physics chapter 16 exercise for Intermediate part-II students.
  • Write a note on RC and RL Series Circuit.
  • What is Power in AC circuit?
  • What is Series Resonant circuit / RLC series circuit? Derive formula for resonance frequency and write its properties.
  • Properties of Series Resonant circuit.
  • What is Parallel Resonance circuit / LC parallel circuit. Write its properties.
  • Important 12th class physics chapter 16 numericals for Intermediate part-II students.
  • Properties of Parallel resonant circuit.
  • What is Three phase AC supply? Write is construction and working with advantages.
  • Advantages of Three phase AC supply
  • What is Principle of Metal detector and uses.
  • What is Choke? Write its uses.
  • Explain Principle, Generation, Transmission And Reception Of Electromagnetic Waves
  • What is Modulation and carrier wave?
  • What is Difference b/w A.M and F.M Amplitude modulation (A.M)?
  • A sinusoidal current has r.m.s value of 10A. What is the maximum or peak value?
  •  Name the device that will (a) permit flow direct current but oppose the flow of alternating current (b) permit flow of alternating current but not the direct current.
  • How many times per second will an incandescent lamp reach maximum brilliance when connected to a 50 Hz source?
  •  A circuit contains an iron-cored inductor, a switch and a D.C. source arranged in series. The switch is closed and after an interval reopened. Explain why a spark jumps across the switch contacts?
  • How does doubling the frequency affect the reactance of (a) an inductor (b) a capacitor?
  • A choke coil placed in series with an electric lamp in an A.C. circuit causes the lamp to become dim. Why is it so? A variable capacitor added in series in this circuit may be adjusted until the lamp glows with normal brilliance Explain, how this is possible?
  • Explain the conditions under which electromagnetic waves are produced from a source?
  • How the reception of a particular radio station is selected on your radio set?
  • An alternating current is represented by the equation I = 20 sin 100 pi t. Compute its frequency and the maximum and r.m.s values of current.
  • A sinusoidal A.C. has a maximum value of 15A. What are its r.m.s values? If the time is recorded from the instant the current is zero and is becoming positive, what is the instantaneous value of the current after 1 / 300s, given the frequency is 50Hz.
  • Find the value of the current and inductive reactance when A.C. voltage of 220V at 50Hz is passed through an inductor of 10H.
  • A circuit has an inductance of 1 / pi H and resistance of 2000Ohm. A 50 Hz A.C. is supplied to it. Calculate the reactance and impedance offered by the circuit.
  • An inductor of 3 / pi H is connected in series with a resistance of 40 Ohm. Find (i) the peak value of the current (ii) the r.m.s value, and (iii) the phase difference between the current and the applied voltage V = 350sin(100pi t).
  • A 10 mH, 20 Ohm coils is connected across 240V and 180 / pi Hz source. How much power does it dissipate?
  • An alternating source of emf 12V and frequency 50Hz is applied to a capacitor of capacitance 3uF in series with a resistor of resistance 1k Ohm. Calculate the phase angle.
  • What is the resonant frequency of a circuit, which includes a coil of inductance 2.5H and a capacitance 40uF?

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