Electrical Circuits

201. What determines the direction of induced emf in a conductor or coil?

1. Cork screw rule
2. Fleming's left hand rule
3. Ampere's circuital law
4. Fleming's right hand rule

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202. What determines the magnitude of electric current?

1. The rate at which electrons are produced
2. The type of material used
3. The current carrying capacity of the circuit
4. The rate at which electrons pass a given point

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203. What dielectric is generally employed by a variable capacitor?

1. Mica
2. Air
3. Electrolyte
4. Ceramic

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204. What does a capacitor store?

1. Voltage
2. Charge
3. Current
4. Power

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205. What fusion of elements is without chemical action between them?

1. Mixture
2. Compound
3. Alloy
4. Ionization

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206. What increases the resistance of wire at high frequencies?

1. Temperature
2. Voltage
3. Skin effect
4. Insulation

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207. What is a closed path made of several branches of the network called?

1. Junction
2. Node
3. Terminal
4. Loop

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208. What is a rotating vector whose projection can represent either current or voltage in an ac circuit?

1. Polar diagram
2. Scalar quantity
3. Velocity
4. Phasor

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209. What is considered as the most important value of a sine wave?

1. Effective value
2. Peak value
3. Average value
4. Instantaneous value

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210. What is expected when two 20 kΩ, 1 watt resistor in parallel are use instead of one 10 kn, 1 watt?

1. Provides higher current
2. Provides less power
3. Provides more power
4. Provides wider tolerance

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