Electricity and Magnetic Fundamentals

211. The reluctance of a magnetic circuit varies with

1. length X area
2. area -- length
3. length + area
4. length + area

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212. The reluctance of the magnetic circuit is _________ _ relative permeability of the material comprising the circuit.

1. directly proportional to
2. inversely proportional to
3. independent of
4. dependent of

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213. The resistance of a material is _________ its area of cross-section.

1. directly proportional
2. independent of
3. inversely proportional to
4. equal to

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214. The resistivity of a conductor _________ with an increase in temperature.

1. increases
2. decreases
3. remains the same
4. becomes zero

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215. The science of adapting electronics to aerospace flight.

1. Avionics
2. Aerotronics
3. Aerodynamics
4. Astrionics

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216. The simplest type of atom to exist is the _________ atom.

1. Helium
2. Hydrogen
3. Boron
4. Oxygen

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217. The space outside the magnet where its pole have a force of attraction or repulsion on a magnetic pole is called

1. Magnetic field
2. Electric field
3. Electromagnetic field
4. Free Space Field

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218. The straight line passing through the two poles of magnet is called

1. Real axis
2. Cartesian axis
3. Magnetic axis
4. Imaginary axis

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219. The temperature coefficient of resistance of a conductor _________ with an increase in temperature.

1. increases
2. decreases
3. remains the same
4. becomes negative

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220. The temperature coefficient of resistance of conductors is

1. positive
2. zero
3. negative
4. infinite

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