Electric Circuits Answers

Which of the following statements are true for power factor correction?

1. The design of power transmission system is not very sensitive to the magnitude of the current in the lines as determined by the applied loads

2. The design of the power transmission system is very sensitive to the load resistance

3. The design of the power transmission system is sensitive to current magnitude only.

4. The design of any power transmission system is very sensitive to the magnitude of the current in the lines as determined by the applied loads.

An electric bulb is rated 60W and 120V. Calculate the resistance of its filament when it is operating normally

15. The armature winding of a 200-V, 4-pole, series motor is lap-connected. There

are 280 slots and each slot has 4 conductors. The current is 45 A and the flux per pole is 18 mWb.

The field resistance is 0.3 Ω; the armature resistance 0.5 Ω and the iron and friction losses total

800 W. The pulley diameter is 0.41 m. Find the pull in newton at the rim of the pulley.

Armature of a 6-pole, 6-circuit D.C. shunt motor takes 400 A at a speed of 350 r.p.m. The flux per pole is 80 milli-webers, the number of armature turns is 600, and 3% of the

torque is lost in windage, friction and iron-loss. Calculate the brake-horse-power.

Two capacitors of capacitances 1μF and 0.01μF are charged to the same potential,

which will give more intense electric shock if touched? Explain.

when a 12 V car battery powers a single 30.0 W headlight how many electron pass through it each second.

A valtage of 200v is connected across a capacitor of a capacitance of 2.5uF. calculate the charge deposited on each plate

This lab focuses on an ohmic resistor. This simply means that the resistor follows Ohm’s law. Many circuit components are ohmic, but not all. Based on external reading, what are some examples of non-ohmic resistors