Electric Circuits Answers

THE SUBSTATION BUSBAR IS MADE UP OF 2 INCHES ROUND COPPER BARS 240in LONG.

WHAT IS THE RESISTANCE OF EACH BAR IF RESISTIVITY IS 1.724 x 10-6 OHM-CM?

For a series LRC circuit, if L=30H, R= 0.05 ohms and C= 5.8F, what is the time required for the amplitude of the charge stored by the capacitor to be halved?

What will be the time required to half the amplitude of charge stored by a capacitor and time for the energy stored to be halved in a series LRC circuit with L=40H, R=0.03 ohms and C=4.8F?

A child slides across a floor in a pair of rubber-soled shoes. The friction force acting on each foot is 20.0 N. The footprint area of each shoe sole is 14.0 cm2, and the thickness of each sole is 5.00 mm. Find the horizontal distance by which the upper and lower surfaces of each sole are offset. The shear modulus of the rubber is 3.00 MN/m2.

Write the phasors for the voltages and the currents marked in the circuit

shown in the figure.

Construct a phasor diagram showing Vs, IR, Ic, and IL.

2. 5H

m

IL

LR

Ic

500 Ω

20 µF

Vs (t) =500sin (100t) V

The deepest point in the ocean is in the Mariana Trench, about 11 km deep, in the Pacific. The pressure at this depth is huge, about 1.13 x 10^8 Pa. (a) Calculate the change in volume of 1.00 m3 of seawater carried from the surface to this deepest point. (b) The density of seawater at the surface is 1.03 x 10^3 kg/m3. Find its density at the bottom. (c) Explain whether or when it is a good approximation to think of water as incompressible.

A piece of resistant wire of diametre of 0.8mm and resistant is 6ohm's has a resistivity of 8.8*10^4 metre.calculate the length of the wire take π=22/7

The deepest point in the ocean is in the Mariana Trench, about 11 km deep, in the Pacific. The pressure at this depth is huge, about 1.13 x 10^8 Pa. (a) Calculate the change in volume of 1.00 m3 of seawater carried from the surface to this deepest point. (b) The density of seawater at the surface is 1.03 x 10^3 kg/m3. Find its density at the bottom. (c) Explain whether or when it is a good approximation to think of water as incompressible.l

Three resistors are used in an electric saw. Each resistor has a resistance of 100 Ω each.

Two of the resistors are connected parallel to each other. A third is connected in series

with the other two. A current of 0.2 A flows through a resistor in one branch of the

parallel resistors. Calculate total parallel resistance

Differences between electric shock versus spark?