Electric Circuits Answers

A 35 W radio is on for 2.5 h. If the voltage across the radio's terminals is 120 V, how much total charge moves through the radio while it is on?

Three 2100 Ω resistors, all in parallel, are connected across a 210-V dc source. Calculate (a) the

total current, (b) the current through each resistor, and (c) the total power dissipated in the resistors.

A flat circular disk of radius "a" is placed inside a uniform external electric field E' pointing in positive z direction. calculate the net electric flux through the disk.

Two charges q1 = –6 μC and q2 = +10 μC are placed 12 cm apart. Another charge, q3 = −2 μC is placed in the middle as shown in Figure 6. Determine the magnitude and direction of the force acting on q3 by the charge q1 and q2

A 6 V battery is connected across three 100 ohm resistors in series. What is the current through each resistor?

There are four equal-value resistors connected in series with a 5 V source. A current of 4.63 mA is measured. What is the value of each resistor?

Point charge q1 = -6.00 * 10-6 C is on the x-axis at x = -0.200 m. Point charge q2 is

on the x-axis at x = +0.400 m. Point charge q3 = +3.00 * 10-6 C is at the origin. What

is q2 (magnitude and sign) (a) if the net force on q3 is 6.00 N in the +x direction; (b)

if the net force on q3 is 6.00 N in the -x direction?

Explain SI unit of resistivity.

According to Kirchoof second law, When the negative potential increase in a closed circut then the positive potential in the same closd circuit.........

(Increase-Decrease)

A 9 V battery is connected to a resistor with resistance of 1.60 Ω. (a) How many electrons leave the battery per minute? (b) If the resistor is made of copper wire with radius of 25 µm, calculate the length of the copper wire. The resistivity of copper is given as 1.68×10−8 Ω·m.