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Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.14 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 7 Question 14

Ashok0210

Asked: March 5, 2021In: Class 12 Physics

A coil of inductance 0.50 H and resistance 100 Ω is connected to a 240 V, 50 Hz ac supply. (a) What is the maximum current in the coil? (b) What is the time lag between the voltage maximum and the current maximum?

Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.13 Additional Exercise NCERT Solutions for Class 12 Physics Chapter 7 Question 13

Ashok0210

Asked: March 5, 2021In: Class 12 Physics

An LC circuit contains a 20 mH inductor and a 50 μF capacitor with an initial charge of 10 mC. The resistance of the circuit is negligible. Let the instant the circuit is closed be t = 0. (a) What is the total energy stored initially? Is it conserved during LC oscillations? (b) What is the natural frequency of the circuit? (c) At what time is the energy stored (i) completely electrical (i.e., stored in the capacitor)? (ii) completely magnetic (i.e., stored in the inductor)? (d) At what times is the total energy shared equally between the inductor and the capacitor? (e) If a resistor is inserted in the circuit, how much energy is eventually dissipated as heat?

Class 12 Physics CBSE and UP Board Alternating Current Chapter-7 Exercise 7.12 NCERT Solutions for Class 12 Physics Chapter 7 Question 12

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A series LCR circuit with R = 20 Ω, L = 1.5 H and C = 35 μF is connected to a variable frequency 200 V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?

A coil of inductance 0.50 H and resistance 100 Ω is connected to a 240 V, 50 Hz ac supply. (a) What is the maximum current in the coil? (b) What is the time lag between the voltage maximum and the current maximum?

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