Electric Currents (Part 1)

What is the SI unit for measuring electric current?

• Ampere

• Volt

• Watt

• Ohm

Why can't lightning be used to power devices like a computer?

• It does not provide a continuous flow of charges.

• It has too high voltage.

• It is too dangerous.

• It is too unpredictable.

Which device requires more amperes to operate properly?

• Video game console

• Video game controller

• LED light

• Smartphone

What does an ampere measure?

• The flow rate of electrical current

• The voltage of a circuit

• The resistance in a wire

• The power consumption of a device

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What is electric current?

• Electric current is a type of voltage.
• Electric current is the flow of electric charge.
• Electric current is the storage of electric energy.
• Electric current is the resistance to flow.

Why can lightning NOT be used to power this dishwasher?

• the dishwasher doesn’t need current to operate

• lightning does not provide a continuous flow of current

• lightning does not provide enough amperes of current

• nonenone of the above

The amount of ​ (a)   which flows through something is measured in amperes. An ​ (b)   is the SI unit of electric current.

• electric current
• ampere

One ​ (a)   is equal to 6.241 × 1018 electrons per second passing through a point on a ​ (b)   .

• ampere
• circuit

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Which wire has the most electric current flowing through it?

• A

• B

• C

• D

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Why would unplugging a device from this power strip prevent it from working? Electronic devices need a ​ (a)   flow of electrical ​ (b)   to operate. Unplugging a device from a wall outlet or a power strip would ​ (c)   the device from drawing current.

• continuous
• current
• prevent