transformer

The winding of wire around a core which is connected to a source of energy is called the ....... coil.

• primary

• secondary

• tertiary

This picture is an example of a ________________.

• Motor

• Generator

• Step-up transformer

• Step-down transformer

Tags

NGSS.HS-PS3-3

A transformer has 100 turns in the primary coil and 25 turns in the secondary coil. When a 120 V is applied to the primary coil, what is the voltage in the secondary coil?

• 480V

• 30V

• 20V

• 450V

A transformer has primary voltage 200V and secondary voltage 100V , the transformer is called _______ .

• Step up

• Step Down

• None

Electrical symbol of a TRANSFORMER

• 
• 
• 

Ratio of voltages is equal to ratio of _______________________.

• number of iron sheets in core

• number of coil

• number of turns in coil

• number of electromagnetic

A step-down transformer has 36570 turns on its primary coil and 932 turns on its secondary coil. The voltage across the primary circuit is 18.4 kV.

(A) What is the voltage in the secondary coil?

• 469 V

• 0.469 V

• 722000 V

• 722 V

A secondary coil of a transformer has 500 windings. It was supplied with 200 V. How many windings needed at primary coil to produce 100 V.

Tags

NGSS.HS-PS3-1

A Transformer______________

• Changes dc to AC

• Steps up or down AC Voltages & Current

• Changes ac to DC

• Steps up or down DC Voltages & Current

Tags

NGSS.HS-PS3-3

If the primary power of an ideal transformer having a 2:1 voltage ratio is 100 W, the secondary power is:

• 200 W

• 75 W

• 50 W

• 100 W

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-3