The equation relating the current in a circuit with time is i=282.1 sin377t, where the current is measured in amperes and the time in seconds. Find the values of: The r.m.s current  The frequency  The instantenous value of the current when t=2.0ms

For the series RL circuit shown in the figure below, answer the following questions and justify your answer.If the current is kept constant, does the coil have inductance?If the current is kept constant, does the coil affect the current value?Can the reverse emf ever be greater than the battery emf?

A steady current of 3.5 A is flowing through an inductor with 50 volts across it. Find (a) Inductance of the coil if the current falls to zero in 120 msec, (b) Energy stored in the inductor, (c) Number of turns in the inductor for a flux of 40 mWb. adows bu bolow and find the value of current flowind

1) The switch in the ciruit, shown in belou has been in Posikon "a" for a long hime. At t=0, the switch moves instantancously ho positron "b". Find volt) for t70 960n 1602 o.SmH 28V 12-5 nF 20v Volt)

Another name for the RMS value of current or voltage is ... O the effective value O the exact value O the true value O the reactance value

Which of the following is true about all series ac circuits?(a) The voltage across any circuit element is a maximumwhen the current is a maximum in that circuit element.(b) The current at any point in the circuit is always thesame as the current at any other point in the circuit.(c) The current in the circuit is a maximum when thesource ac voltage is a maximum.(d) Resistors, capacitors, and inductors can all change thephase of the current.

a) Find the output waveform for the sinusoidal input of figure Q2a. 20 V Flg.Q2a

A sinusoidal voltage has a value of 100 volts at 2.5 milliseconds and takes 20 milliseconds to complete one cycle. Then find the maximum cost and the time to reach it for the first time.

Eddy currents can be induced only in metals that are not ferromagnetic, for example, copper and aluminium. Select one: True False

The current through a 15kohm resistor is given below, using Ohm’s Law to find the voltage, convert to polar form, complete the math, then convert back to the waveform at i1 = 3.5sin(2500t) mA and i2 = 2.3sin(200t – 60°) mA