Unit 6 - Electricity

Both light bulbs are lit in the circuit above. If one of the lights shut off and the other stays on, what kind of circuit is this?

• series

• parallel

• electromagnetic

• induction

Which of the following is shown in this diagram?

• parallel

• PC

• series

• AC

Insulation materials reduce heat loss because they –(select 2)

• are poor conductors

• decrease the flow of electrons

• allow the flow of electrons

• are good conductors

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Current flowing in only one direction is called

(a)  

• direct current.
• alternate current

Oscillating current that changes direction 120 times per second is called

• series current

• AC

• DC

• parallel current

Alternating current is when the current changes direction every ___ times per second. (this is a number)

The current in our wall outlets and light sockets is

• AC

• 60 ohms

• DC

• both AC and DC

Answer explanation

Math the units to the Ohm's Law equation

• voltage(V)

• ohm's (Ω)

• current (I)

• volts

• resistance(R)

• amps

Give the equation for Ohm's Law.

• solve for I

• solve for R

• solve for V

The resistance of a hotplate is 48 Ω. How much current does the plate carry when connected to a 120-V source?

• none of the above

• 5760 amps

• .4 amps

• 2.5 amps