Alberta Science 9 Electricity Topic 1

What distinguishes static electricity from current electricity?

• The presence of stationary charges

• Continuous flow in a closed circuit

• Generation by moving charges

• Measurement in amperes

Which of the following is an example of a phenomenon related to static electricity?

• Battery powering a flashlight

• Household wiring

• Lightning

• Flowing river

What is the primary function of a three-prong plug?

• To increase voltage

• To regulate current flow

• To amplify electrical signals

• To provide a ground connection

How does an electrolyte differ from a negative electrode in an electrochemical cell?

• Electrolyte conducts electric current

• Electrolyte generates electricity

• Negative electrode stores electrical energy

• Negative electrode prevents electrical discharge

Compare and contrast the functions of fuses and circuit breakers in electrical systems. a) b) c) d)

• Fuses amplify electrical signals, while circuit breakers regulate current flow.

• Fuses regulate voltage, while circuit breakers prevent short circuits.

• Fuses store electrical energy, while circuit breakers generate electricity.

• Fuses break the circuit when overloaded, while circuit breakers trip in case of overload.

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NGSS.MS-ETS1-2

Evaluate the significance of charge separation in the context of electrical phenomena.

• It prevents electrical discharge

• It generates static electricity

• It regulates current flow

• It reduces voltage potential

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NGSS.MS-PS2-3

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What causes the jolts of static electricity when you touch certain objects?

• Friction between your skin and the object
• Magnetic attraction between the object and your body
• Transfer of electrons between the object and your body
• Chemical reaction with the object

What is the fundamental difference between static electricity and current electricity?

• Static electricity is used in electronic devices, whereas current electricity is used in household appliances.
• Static electricity involves charges that are always positive, whereas current electricity involves charges that are always negative.
• Static electricity involves stationary charges, whereas current electricity involves moving charges.
• Static electricity can only be generated by friction, whereas current electricity can only be generated by chemical reactions.

Which law governs the behavior of electric charges stating that opposite charges attract each other?

• Coulomb's Law
• Ohm's Law
• Newton's Law
• Boyle's Law

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NGSS.MS-PS2-3

What is the unit used to measure the rate at which electrical current flows?

• Joules (J)
• Amperes (A)
• Volts (V)
• Ohms (Ω)