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#### Basic Electrical - Electrical Engineering

Basic Electrical Engineering MCQ. Engineering Technical, Basic Electrical, one joule per second is, Filters are used to Convert.

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Question 1: A current is said to be alternating when it changes in?

• Direction only
• Magnitude only
• Both Magnitude & Direction
• None of these
• Answers: Both Magnitude & Direction

Question 2: If 2 sinusoidal of the same frequency but of different amplitudes and phase difference are added, the resultant is a?

• Sinusoid of the same Frequency
• Non-sinusoid
• Sinusoid of half the original Frequency
• sinusoid of double the original frequency
• Answers: Sinusoid of the same Frequency

Question 3:A 240V single-phase ac source is connected to a load with an impedance of 10 2. A capacitor is connected in parallel with the load. If the capacitor supplies 1,250 VAR, the Real power supplied by the source is:

• 2,500 watts
• 1,200 Watts
• 3,600 Watts
• 2,880 Watts

Question 4:A source of angular frequency 1 rad/sec has a source impedance consisting of 1 resistance in series with 1H inductance. The load that will obtain the maximum power transfer is?

• 1 Resistance in parallel with 1H inductance
• 12 Resistance in series with 1F capacitor
• 12 resistance in parallel with 1F capacitor
• 1 Resistance
• Answers: 12 Resistance in series with 1F capacitor

Question 5: The rated voltage of a 3-phase power system is given as?

• RMS Phase voltage
• Peak Line-to-Line Voltage
• RMS Line-to-Line Voltage
• Peak phase voltage

Question 6: For a 3-phase Load balanced condition, each phase has the same value of?

• Resistance
• Impedance
• Power Factor
• All of these

Question 7: A 3-phase Delta-connected symmetrical load consumes P watts of power from a balanced supply. If the same load is connected in star to the same supply, then what is the power consumption?

• P
• P/3
• 3P
• 4P

Question 8: 2 resistors of equal values are connected series across the lines B and C of a symmetrical 3-phase, 400V system. What is the magnitude of the voltage between the line A and the junction of resistors?

• 100/3
• 600/3
• 200/3
• 400/3

Question 9: If a load is purely inductive and the reactive power is 12 VAR, the apparent power is?

• 12VA
• 6VA
• 30VA
• 40VA

Question 10: In a Series RL circuit, 9 V RMS is measured across the Resistor, and 15V rms is measured across the inductor. The peak value of the source voltage is?
• 25.25V
• 20.50V
• 30.20V
• 17.49V

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