Electromagnetism Quiz

A transformer has 200 turns on the primary coil, and 50 on the secondary coil. This is a:

• Step-up transformer
• Step-down transformer

A device that transforms electrical energy to mechanical energy is a

• generator

• motor

• transformer

• magnet

A device that transforms mechanical energy to electrical energy is a

• generator

• motor

• transformer

• magnet

Electromagnetic induction occurs in a coil when there is a change in

• electric field in the coil

• magnetic field in the coil

• voltage in the coil

This picture shows a turbine generator used to produce electricity at a geothermal power plant.
Electricity is produced by using steam to _____________.

• heat the turbine generators
• spin the turbine generators 
• reduce friction in the turbine generators
• reduce emissions from the turbine generators

Tags

NGSS.HS-PS3-4

If a secondary coil has 40 turns, and, a primary coil with 20 turns is charged with 50 V of potential difference, then potential difference in secondary coil would be

• 50 V in secondary coil
• 25 V in secondary coil
• 60 V in secondary coil
• 100 V in secondary coil

Tags

NGSS.HS-PS2-4

Will a transformer work with direct current (d.c.) or alternating current (a.c.)?

• a.c. only
• d.c. only
• Both a.c. and d.c.

What is meant by a step down transformer?

• One where the output voltage is the same as the input voltage.
• One where the output voltage is larger than the input voltage.
• One where the output voltage is smaller than the input voltage.

What can you use to make an electromagnet?

• Battery, nail and string 
• Battery, pencil and wire
• Wire, battery and iron ore (nail)
• Peanut butter, lampshade, hand sanitizer

Tags

NGSS.HS-PS2-5

What two forces are required for generators and electric motors to work? 

• magnetism and thermal 
• electricity and thermal 
• electricity and magnetism 
• magnetism and radiant 

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5