Electrical Circuits

271. Which of the following does not generally affect the value of a capacitor?

1. The dielectric material used
2. The surface area of the plates
3. The thickness of the dielectric
4. The voltage applied to the plate

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272. Which of the following does not refer to electrical energy?

1. Volt-ampere
2. Joule
3. Watt-second
4. Volt-coulomb

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273. Which of the following elements is active?

1. Resistor
2. Inductor
3. Capacitor
4. Ideal voltage source

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274. Which of the following has a positive temperature coefficient?

1. Mica
2. Manganin
3. Silicon
4. Carbon

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275. Which of the following has negative temperature coefficient?

1. Carbon
2. Nickel
3. Brass
4. Constantan

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276. Which of the following is a common material used in wire-wound resistors?

1. Manganin
2. Carbon
3. Bronze
4. German silver wire

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277. Which of the following is a disadvantage of a wire-wound resistor?

1. It has reactance in radio-frequency circuits
2. It cannot handle much power
3. It draws a large amount of current
4. It cannot handle high voltage

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278. Which of the following is a preferred resistor value?

1. 520
2. 47
3. 43000
4. 54321

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279. Which of the following is a way of decreasing mutual inductance?

1. Moving the coils closer
2. Moving the coils apart
3. Decreasing the number of turns of either coil
4. Increasing the number of turns of either coil

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280. Which of the following is also known as anti-resonant circuit?

1. Parallel resonant circuit
2. Series resonant circuit
3. Tuned circuit
4. Tank circuit

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