TRANSFORMERS #1

Primary winding = 400 turns

Secondary winding = 200 turns

If there's 240V @ 8A on primary, the secondary will have...

• 240V @ 4A

• 120V @ 4A

• 480 V @ 4 A

• 120V @ 16 A

Step-up transformers do what?

• Increase V / decrease I

• Increase V & I

• Decrease V / increase I

• Decrease V & I

Primary = 600 V and Secondary = 150 V

This transformer ratio is...

• 1:4

• 6:1.5

• 4:1

• 600: 150

Tags

NGSS.HS-PS3-3

Primary = 120 VAC @ 4 A

Secondary = 8 A and how many volts?

• 240 VAC

• 60 VDC

• 120 VAC

• 60 VAC

The output of a transformer's secondary is measured at 60 V @ 20 A.

Which option below is possible?

• 180 V @ 6.7 A

• 20 V @ 2 A

• 60 V @ 0.67 A

• 6 V @ 20 A

A step-up transformer is designed to...

• take a lower voltage & increase it to a higher voltage while keeping the current the same

• take a higher amperage & decrease it to a lower amperage

• take a lower voltage & increase it to a higher voltage

• take a higher voltage & decrease it to a lower voltage

On a step-up transformer, the turn ration from the primary side to the secondary side will be...

• higher on the primary than the secondary

• lower on the primary than the secondary

• the same on the primary and the secondary

• the same as a step-down transformer

If a transformer uses a 240 V primary winding that has 400 turns and a secondary that has 200 turns, what would be the voltage of the secondary winding?

• 200 V

• 120 V

• 480 V

• none of the above

When there is voltage at the primary side of a transformer and no voltage at the secondary, what could be the problem with the transformer?

• a bad secondary winding only

• a bad primary winding only

• a bad secondary or primary winding

• a bad fuse at the power supply

When measuring an open secondary winding of a transformer, what measurement will be obtained?

• an infinite resistance

• a measurable resistance

• a zero resistance

• continuity