Electricity & Magnetism

A device that uses electrical energy as it interferes with the flow of charge is a:

• resistor
• conductor
• insulator
• superconductor

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

An example of a conductor is :

• a glass paperweight
• a plastic cap
• a metal screw
• a wooden handle

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An ampere is unit of

• temperature
• electric current
• length
• magnetic force

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An alternating current:

• Flows in 1 direction only
• turns on and off repeatedly
• flows in one direction only
• reverses direction repeatedly

When you scuff your feet on a rug, electric charges move off you by

• static discharge
• friction
• static discharge
• conduction

What causes current to flow?

• potential difference
• energy
• electricity
• magnetism

Wrapping a wire in a coil creates

• a strong magnetic field
• solar energy
• new magnets
• series circuit

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An example of a power source is a(n)

• magnet
• electrical wire
• battery
• a resisitor

According to Ohm's law, Resistance is equal to to voltage divided by:

• potential difference
• conduction
• time
• current