DC Circuits III MA 2 16 23

What will happen to the magnets when they are brought closer together?

• The magnets will attract each other.

• The magnets will repel each other

• The magnets will create a voltage.

• The magnets will start spinning faster the closer they get.

A magnetic field is the lines in which magnetic force acts. Lines emanate from the north pole and enter the south pole of a magnet, forming a closed loop.

• True.

• False.

What is a current carrying conductor wrapped around a metal core called?

• Coil

• Conductor

• Magnet

• Insulator

The strength of a magnetic field can be affected by:

• The number of turns of conductor

• The amount of current flow through the conductor

• Type of material in the core

• All of the above

A common application of a solenoid is a relay. Which of the following is the relay?

• 
• 
• 
• 

In regards to a relay, the Normally Open Contacts (NO) allow current to flow through the contacts, until the coil is energized.

• True.

• False.

What will happen to the indicator lamps when the Start switch is pressed?

• The Red(R) lamp will turn on and the Green(G) lamp will turn off.

• The Green(G) lamp will turn on and the Red(R) lamp will turn on.

• The Red(R) lamp will turn off and the Green(G) lamp will turn off.

• The Green(G) lamp will turn on and the Red(R) lamp will turn off.

Turning the Power On will automatically turn On Pump 1.

• True.

• False.

What type of relay does the diagram represent in regards to poles and throws?

• SPST

• SPDT

• DPST

• DPDT

Relay Logic: Relays can be configured within a control circuit to do which of the following specific outcomes?

• Energize

• Maintain

• Disable

• All of the above.