Electrical Systems

This diagram shows _____.

• a circuit breaker

• overloading of a socket

• a melting fuse

• an electrocution hazard

The diagram shows a _____.

• circuit breaker

• fuse

• rheostat

• switch

The _____ makes use of the magnetic effect of current.

• earpiece

• electroplating method

• kettle

• filament bulb

Tags

NGSS.MS-PS2-3

What part of a circuit is this object?

• power source

• load

• pathway

• switch

How do you calculate total resistance in a parallel circuit?

• R1 + R2 + R3

• R1 - R2 - R3

• 1/R1 +1/R2 + 1/R3 = 1/RT

• R1 = R2 = R3

What is the equivalent or total resistance (R_e) across this circuit?

• 3 kΩ

• 10 kΩ

• 13 kΩ

• 18 kΩ

in which circuit is the lamp brightest

• 1

• 2

• 3

• All the same

In a series circuit  with 4 bulbs:

• a switch is never used

• all of the bulbs become dimmer if another bulb is added

• There are many paths for electricity to take

• the remaining 3 bulbs stay lit if one burns out

A __________opens and closes a circuit?

• key
  key

• magnet

• switch

• electromagnet

What is resistance?

• the rate at which a charge is flowing

• the material's tendency to resist flow of electrons

• the difference of charge between 2 points

• it is futile