Problem 1 (25 points): Three equal positive charges of 2uC are located on the co

Question

Problem 1 (25 points): Three equal positive charges of 2uC are located on the corners of an equilateral triangle of side 1 m as shown below (a) Calculate the net force on the top charge only (magnitude and direction). (7+3 (b)Calculate the total work done in bringing the charges from infinity to this configuration. (5) (c) Use Gauss's law to calculate the total electric flux through an imaginary surface enclosing the charges (dashed line in figure). (10) Im Im Imaginary Gaussian surface Im Problem 2 (20 points): Two capacitors of equal capacitance of 5F are connected to a 12V battery as shown below IF SF 12V (a) Which point in the circuit has a higher potential, a or b? (5) (b) Calculate the charge on each capacitor. (15) Page 2 of 2 PHY 108 (Evening session) 07/27/201S Exam I (100 points) Problem 3 (20 points): For the circuit shown below 1 2 6V e (a) Calculate the equivalent resistance of the circuit. (5) (b) Calculate the magnitude and direction of the current in the circuit. 5) (c) Calculate the power lost in each resistor. (5) (d) Arrange the potentials at points a, b and c in increasing order. (5)

Explanation / Answer

as per guidelines,i can answer only one for you.Will solve the last one.Please raise different question for other one's

a)both the resistor are in series

so Req=R1+R2

=1+2

Req=3ohm--answer to a

b) using ohm's law

V=IR

6/3=I

2Amp=I the current will be clockwise--answer to b

c) P=V^2/R

power lost in 1ohm resistor

P=6^2/1

P=36watt

power lost in 2ohm resistor

P=6^2/2

P=18 watt

d) c>b>a

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