Electricity and Magnetism Test Review Quizizz

What type of electric charge transfer is lightning? 

• Static electricity

• Static discharge

• chemical

• mechanical

How does a battery work

• converts chemical energy into electrical

• converts electrical energy into chemical

• it provides resistance

• protons flow out of it

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Ho do you increase the strength of an electromagnet? 

• add more loops

• add voltage (aka add a battery)

• remove loops

• remove voltage (aka remove a battery)

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Ho do you decrease the strength of an electromagnet? 

• add more loops

• add voltage (aka add a battery)

• remove loops

• remove voltage (aka remove a battery)

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What is a benefit of electromagnets that regular magnets cannot do?

• they can be turned on and off

• they can attract metal objects

• they repel metal objects

• they can be broken into separate poles (north and south)

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If V=IR; which circuit below contains the greatest voltage?

• A circuit with a current of 20 amps and a resistance of 16 ohms

• A circuit with a current of 2 amps and a resistance of 16 ohms

• A circuit with a current of 20 amps and a resistance of 6 ohms

• A circuit with a current of 25 amps and a resistance of 20 ohms

Alexandra was preparing to go on a hike in the woods.  She gathered the equipment she would need and placed it on the kitchen counter.  By chance, she placed her compass near an electrical outlet.  Although the compass was not moving, the compass needle turned because              .

• the electric current in the outlet produced a magnetic field

• the compass could only be used outdoors

• the kitchen counter was made of a magnetic substance

• the kitchen had a microwave oven

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In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, what happens to the current?

• it increases

• it descreses

• it stays the same

In a closed circuit containing one resistor and a battery, if the voltage in the battery increases, what happens to the resistance?

• it increases

• it descreses

• it stays the same

In a closed circuit containing one resistor and a battery, if the resistance in the battery increases, what happens to the current?

• it increases

• it descreses

• it stays the same