Electric Circuits Answers

A silicon pn-junction at T=300k is doped at Nd=10^16 and Na=10^17. The junction capacitance to be cj=0.8p.f when a reverse bias voltage of VR=5v is applied . Find the zero biased junction

Assuming 100% efficient energy conversion, how much water stored behind a 50 cm high hydroelectric dam would be required to charge the battery?

Find the force on each segment of the wire shown in Figure below
if B=0.15 T. Assume the current in the wire to be 5.0 A.

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Explain how moving the charger into the shade affects the time needed to recharge the battery fully.

1)
O
B 3 cm
+2 μC
Figure 1
5 cm
A -2μC 4 cm
There are two charged spheres are located like shown in figure above. Coulomb’s constant

Two bodies of equal charges each of 1C are separated in air by a distance of 1km. find the magnitude of the electric force between them.

A cell of e.m.f. E and internal resistance r was connected in series with two series
external resistors, A (of 8-ohms) and B (of 2-ohms). A high resistance voltmeter
connected across A was found to read 8 volts. When another resistor C (of 8 ohms) was
connected parallel to A, and then across A and C, the voltmeter read 6 volts.
(i) Draw the circuit diagrams of the two arrangements
(ii) Calculate the internal resistance of the cell
(iii) Calculate the e.m.f. of the cell.

10 volt cell was used to drive a circuit with an external resistor of resistance of 4 ohm and internal resistance of 1 ohm. Determine the current delivered by the cell

1. If Identical 2cells each of 3volts are connected in series, determine the overall or effective e.m.f.