12th Physics | एम्पीयर का परिपथीय नियम Ampere's Circuital Law Ch 4 Lec 4 | By Gopal Sir✅

Problem based on biot savart law and ampere's circuital law (L-1 to L-4)

When a coil is connected to a D.C. source of e.m.f. 12 volt, then a current of 4 ampere flows in it. If the same coil is connected to a 12 volt, 50 cycle/s A.C. source, then the current flowing in it is 2.4A . The self inductance of the coil will be

A student in a lab took a coil and connected it to a 12 VDC source. He measures the steady state current in the circuit to be 4 A . He then replaced the 12 VDC source by a 12V,(omega=50rad/s)AC source and observes that the reading in the AC ammeter is 2.4 A . He then decides to connect a 2500 muF capacitor in series with the coil and calculate the average power developed in the circuit. Further he also decides to study the variation in current in the circuit (with the capacitor and the battery in series). Which of the following graph roughly matches the variation of current in the circuit (with the coil and capacitor connected in the series) when the angulr frequency is decreased from 50 rad/s to 25 rad/s?

A student in a lab took a coil and connected it to a 12 VDC source. He measures the steady state current in the circuit to be 4 A . He then replaced the 12 VDC source by a 12V,(omega=50rad//s)AC source and observes that the reading in the AC ammeter is 2.4 A . He then decides to connect a 2500 muF capacitor in series with the coil and calculate the average power developed in the circuit. Further he also decides to study the variation in current in the circuit (with the capacitor and the battery in series). The value of resistance of the coil calculated by the student is

A student in a lab took a coil and connected it to a 12 VDC source. He measures the steady state current in the circuit to be 4 A . He then replaced the 12 VDC source by a 12V,(omega=50rad//s)AC source and observes that the reading in the AC ammeter is 2.4 A . He then decides to connect a 2500 muF capacitor in series with the coil and calculate the average power developed in the circuit. Further he also decides to study the variation in current in the circuit (with the capacitor and the battery in series). The power developed in te circuit when the capcitor of 2500 muF is connected in sereis with the coil is