Electric Circuits Answers

Consider a charge (+5.0μC) fixed at a site with another charge (charge +3.0μC, mass 6.0μg) moving in the neighboring space. (a) Evaluate the potential energy of when it is 4.0 cm from . (b) If starts from rest from a point 4.0 cm from , what will be its speed when it is 8.0 cm from ? (Note:is held fixed in its place.

A set of parallel plates has a capacitance of 5.0µF. How much charge must be added to the plates to increase the potential difference between them by 100 V?

source voltage= 40V

series resistance = 200 ohm

zener voltage= 15V

What is the size in square millimeter (mm2 ) is the cable 250 MCM size?

An electron is accelerated from rest through a potential difference 12 V. What is the change in electric potential energy of the electron? Explain your answer.

1. Calculate the electric potential of q1 = 25.0nC at (a) 1.00m, (b) 2.00m, and (c) infinite long distance from it.

2. Calculate the potential energy that another charge q2 = 5.00nC possess when placed at the three different points of the previous example.

1. Determine the reading of the voltmeter shown in the figure. Consider the values of the
resistors as: R1 = 5Ω, R2 = 4.4Ω, R3 = 7.7Ω, R4 = 4.5Ω, R5 = 4.8Ω and that the source
provides a voltage V = 8.2V .
2. Let us be two cylindrical conductors connected in parallel, to which a potential
difference of V = 170V is applied. The two conductors are made of the same material,
but the first is 6 times the length of the second, and the radius of the second. The
resistance of the second is R2 = 469Ω. Determine the equivalent resistance.
3. In the circuit shown in the figure, the ideal ammeter measures I = 0.4A in the indicated
sense, and the ideal voltmeter measures a potential drop of V = 8.8V passing from b a a.
Determines the value of the emf ε2
.
Data: R1 = 56.2Ω, R2 = 23.3Ω, R3 = 27.4Ω.
1

A cell has a terminal voltage of 1.35 V when it is connected to a 0.9 ohm external resistor. 

When the resistance is increased to 2.4 ohm, the terminal voltage is 1.44 V. Calculate the 

internal resistance of the cell.

A potential difference of 2 volt is applied between points A and B as shown in the network shown in the figure.calculate 1) equivalent resistance of the network across the points A and B 2)the magnitude of currents in the arms AFCEB and AFDEB?

The instaneous value of voltage in an a. c circuit at any time t seconds is given by v=100sin(50πt-0.523) V. Find

1:The peak to peak voltage, the frequency and the phase angle

2:the voltage when t=0

3:the voltage when t=8ms

4:the times in the first cycle when the voltage is 60V and -40V

5:the first time when the voltage is maximum