Review unit 4 part 3

How much value of secondary current of a transformer with 3 Ampere passing in the primary winding and 200 volts if there is 100 volts in the secondary winding?

• Is = 3 A

• Is = 5A

• Is = 0.166A

• Is = 6A

Refer to the figure below, if the step-down transformer has a 3:1 ratio, what is the value of secondary voltage and current?

• 110V , 2A

• 80 V, 1.5A

• 120V, 1A

• 220V, 1A

What is the voltage applied on the load?

• 1000 Volts

• 500 Volts

• 250 Volts

• 65.5 Volts

Refer to figure below. What is the load current of transformer?

• 3 A
  

• 2 A

• 6 A

• 1 A

Refer to figure below. What is the primary voltage of this circuit and load power?

• 200 V

• 50 V

• 500 V

• 300 V

Power factor is defined as______________________

• The property of a device or component to store an electrostatic charge

• The ratio of true power to apparent power

• The electrical property of a circuit that oppose any change in the current flowing in it

• The force that moves free electrons along the conductor

What is called the states how much reactive load the circuit contains?

• True power

• Reactive power

• Apparent power

• Power factor

When there is an inductive load, some of the power supplied is not used to do work. This wasted power is called?

• True power

• Reactive power

• Apparent power

• Power factor

When there is a resistive load, the power supplied is used to do work. This type of power is called?

• True power

• Reactive power

• Apparent power

• Power factor

The power factor of the Capacitive load is__________________

• 11

• 0.0

• 0.1

• 1.0