Transformers (Electromagnetic Inductions)

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

The function of a transformer is to ...

• raise and lower the apparent power levels

• transfer DC voltage from the primary winding to the secondary winding

• increase or decrease A.C voltage or A.C current levels

• transform mechanical energy into electrical energy

Tags

NGSS.HS-PS3-3

If a transformer reduces voltage, it is called a....................... transformer.

• step left

• step right

• step up

• step down

A transformer is designed to step up 110 V to 1320 V. If there are 300 turns on the primary side, how many turns are on the secondary side?

• 3600

• 1200

• 484

• 100

A transformer has 2.000 turns of the primary winding and 200 V the primary voltage. Determine the secondary winding if the secondary voltage 150 V.

• 2000 turns
• 1000 turns
• 500 turns
• 1500 turns

Electrical symbol of a TRANSFORMER

• 
• 
• 

The production of electric current by a changing magnetic field is called ____________________________________.

• induced current

• electromotive force

• electromagnetic induction

• internal resistance

Tags

NGSS.HS-PS2-5

A magnet can move in a coil of wire to produce electricity in which system?

• Generator
• Motor
• Magnet
• Transformer

Tags

NGSS.HS-PS2-5

Which activity will produce the highest current?

• Move the magnet bar into the coil while the coil remains stationery

• Move the coil into the magnet bar while the magnet remains stationery

• Move the coil and magnet towards each other

• Move the coil and magnet away from each other

Tags

NGSS.HS-PS2-5