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The resistance of a uniform copper wire 50.0 meters long and 1.15mm in diameter is 0.830 ohms at 20°C. What is the resistivity if the copper at this temperature?
Two resistances, one 12 Ω and the other 18 Ω, are connected in parallel. What is the equivalent resistance of the parallel combination?
1. Three 7.20 resistors are connected in series. Illustrate a schematic diagram for the case. What is their equivalent resistance? Show your complete solution.
1. You connect a number of identical light bulbs to a flashlight battery. (a) What happens to the brightness of each bulb as more and more bulbs are added to the circuit if you connect them (i) in series and (ii) in parallel? (b) Will the battery last longer if the bulbs are in series or in parallel? Explain your reasoning.
a 250v generator supplies through a pair of feeders to a load consisting of 200 lamps of 200 watt each, 50 lamps of 100 watt each and 25 lamps of 40 watt each at a distance of 200m. the potential difference across the lamps is 240v. find the cross-section area of the wire, if the specific resistance of the wire is 1.77 micro ohm cm
Why did we choose to use a square wave with our function generator? What does it act like a substitute for? What happens as the frequency of the square wave increases?
Charge Q is distributed uniformly throughout an insulating sphere of radius R. The mr nitude of the electric field at a point R/2 from the center
If a sphere has a radius of 0.5m. What will be the magnitude of electric flux due to enclosed charges of positive 1 nano coulomb and negative 3 nano coulomb?
determine the electrical force attraction between to balloons that are charged with the opposite type of charge but the same quantity of charge . The charge on the ballons is 6.0 x 10-7C and they are separated by a distance of 0.50 m
Research how the cell is considered a capacitor. Explain your
answer in five (5) sentences. You may include illustrations
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