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c) If the area of a capacitor plates is squared three times and its square root distance tripled twice. What is the final value of its capacitance?
b) Three resistors, two of 4K8 both in parallel and a third one, are connected in series. A fourth resistor of 4M5 and fifth of twice the value of the third resistor together in series are connected in parallel with this circuit. The equivalent resistance of all the five resistors is given by 3K5.
i. Calculate the value of the third and fifth resistors.
ii. If a battery with e.m.f. of 20V is connected to this final circuit, calculate the current through the fifth resistor. Repeat for capacitors.
Three charges lie along the x - axis as in figure. The positive charge q1 = 9 μC is at x = 3 m, and the positive charge q2 = 25 μC is at the origin.
Where must a charge q3 be placed on the x - axis so that the resultant electric force on it is zero?
even the transistor able to do switching and amplification, why were the amplifiers introduce into the industry. justify the answer with the mathematical description
Electromotive force of a cell
For a half-wave rectifier having diode voltage VD and supply input of VI, the diode conducts for π – 2Θ, where Θ is given by
a)tan -1 VD/VI
b)tan-1 VD/VI – VI
c)sin-1 VD/VI
d)sin-1 VD/VI – VI
