< br /> < br /> < br /> 5 magnetism acts through non-magnetic materials.< br /> a) true< br /> b) false< br /> c) none< br /> d) both a and b< br /> 6. the strength of the south pole of a magnet is< br /> a) less than< br /> b) greater than< br /> the strength of its north pole.< br /> c) equal to< br /> d) none< br /> poles repel each other.< br /> 7.< br /> a) like< br /> b) un-like< br /> c) both a and b< br /> d)none< br /> 8. most of the magnetic power appears to be concentrated at certain points of a magnet. these points are< br /> called< br /> a) keepers< br /> c) centre< br /> b) inductors< br /> d) poles< br /> 9. wherever an electric current exists, a magnetic field cannot exist.< br /> a) true< br /> c) both a and b< br /> bi false< br /> d) none< br /> 10. unlike magnetic poles create a force of attraction.< br /> al true< br /> b) false< br /> c) both a and b< br /> d) none< br /> 1. materials such as copper, brass, and aluminum are called ferro-magnetic materials< br /> a) true< br /> b) false < br /> c) both a and b < br /> d) none< br /> < br />

most voltage drop calculators want the distance between the source and destination. then internally, they double it so both the source and return wires are calculated. but you need to know which distance the calculator uses so you're not half of what you should be or double what you should be.

most circuit breakers will not take a #6 directly, so the electrician will have to splice on a smaller pigtail. you also have to upsize the grounding wire when you upsized the ungrounded (hot) wire (see note in 250.122). this will preclude using most cable assemblies, as a cable with #6 copper will most likely only have a #10 grounding conductor. you need a #6 grounding conductor if the circuit is 20a. a #8 cable is no better, as it will have a #10 grounding conductor too. but most 20a breakers will take a #8 directly.

in your related post, you didn't say what type of load this is. if it is a light or heater, voltage drop won't be a big issue. if this is a motor, the current needs are huge at startup and the voltage drop can pose a problem. if this is a motor, knowing if the motor is under much load during startup will answer the voltage drop effect (a saw is easier to start than a compressor).

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.