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The branch of engineering which deals with the generation, transmission, and distribution of electrical power. It also involves the design and construction of electronic components which utilize electricity.

A 20 ohm, 1/4 watt resistor connects to a 12 Volt source. Which of the following statements is correct:

1. A current of 0.6 Amps will flow through resistor
2. A current of 0.02 Amps will flow
3. The resistor will burn away
4. 240 Amps will flow

Correct answer: 3. The resistor will burn away

A 12 volt source causes a current flow of 0.6 in 20 ohms resistor. 0.6 Amps of current flow means a power of 7.2 watts (P = VI = 12 * 0.6 = 7.2 watts) and this power is not bearable for the 1/4 W (0.25 watts) resistor and will cause it to burn.

For 400 Hz frequency, the time period is:

1. 0.025 s
2. 0.0025 s
3. 200 s
4. 400 s

Time period = 1/f = 1/400 Hz = 0.0025 s

Transformer short circuit test is performed to find:

1. Iron losses
2. Copper losses
3. Both of these
4. None of these

The power factor of series RLC circuit at resonance is:

1. 0.5
2. 0.8
3. 0.9
4. Unity
5. Zero

The RMS value of a Sin wave having peak value 282 is:

1. 100
2. 200
3. 222
4. 300

For Sin wave RMS = 0.707*Peak = 200

In a delta connected system:

1. Phase voltage = √ 3 * Line voltage
2. √ 3 * Phase voltage = Line Voltage
3. Phase voltage = Line voltage
4. None of these

Correct answer: 3. Phase voltage = Line voltage

Which one of the following cases has highest capacitive reactance:

1. High capacitance and High frequency
2. High capacitance but low frequency
3. Low capacitance and Low frequency
4. Low capacitance but high frequency

Correct answer: 3. Low capacitance and Low frequency

Ammeter connects in:

1. Series
2. Parallel
3. Both

The function of filter in DC Power supply is to:

1. Convert AC to DC
2. Convert AC to pulsating DC
3. Remove ripples from pulsating DC
4. Maintain a constant voltage despite of changes in input

Correct answer: 3. Remove ripples from pulsating DC

Which one the following is known as universal gate:

1. NAND
2. AND
3. OR
4. NOT