Electrical Engineering Principles Part 1

Figure 1 shows the phasor diagram for a reactive circuit which operates at 200 Hz.

Determine the following:

a) Supply voltage Vs using the formula Vs = √ V1² + V2²

• 270.3V

• 360.6

• 342.5

• 380.2

Figure 1 shows the phasor diagram for a reactive circuit which operates at 200 Hz.

Determine the following:

a) Phase angle using the formula sin-1 V1/Vs

• 33.7 degrees

• 36 degrees

• 34.2 degress

• 38.2 degrees

Figure 1 shows the phasor diagram for a reactive circuit which operates at 200 Hz.

Determine the following:

a) Power factor using the formula, cos 𝝓

• 0.86

• 0.36

• 0.83

• 0.68

Figure 1 shows the phasor diagram for a reactive circuit which operates at 200 Hz.

Determine the following:

a) Power dissipated using the formula Power = VI

• 9 kW

• 5kW

• 4 kW

• 3 kW

Figure 1 shows the phasor diagram for a reactive circuit which operates at 200 Hz.

Determine the following:

a) Reactive Power using the formula VA (Volt-Amperes)

• 9 kVA

• 2 kVA

• 4 kVA

• 3 kVA

Power Factor can be described as…

• The cosine of the angle between useful power and total.

  Power = cos ø.

• Useful power (kW) divided by the total power (kVA)

• • Real power (P) / apparent power (S).

• All of these