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Science finals - GR 9 > Physics/Electricity > Flashcards

Physics/Electricity Flashcards

1
Q

Q1: What is electricity?

A

A1: The flow of electric charge.

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2
Q

Q2: What is static electricity?

A

A2: A buildup of electric charge on a surface.

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3
Q

Q3: What is current electricity?

A

A3: The flow of electric charges through a conductor.

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4
Q

Q4: What are the three subatomic particles?

A

A4: Protons (+), neutrons (neutral), and electrons (-).

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5
Q

Q5: What is the force of electricity?

A

A5: The force that attracts or repels charges.

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6
Q

Q6: What are the two types of charges?

A

A6: Positive and negative.

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7
Q

Q7: What do like charges do?

A

A7: They repel.

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8
Q

What do opposite charges do?

A

Attract

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9
Q

Q9: What is the law of electric charges?

A

A9: Opposite charges attract; like charges repel.

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10
Q

Q10: How is static charge created?

A

A10: By rubbing two objects together, transferring electrons.

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11
Q

Q11: What is the electrostatic series?

A

A11: A list that shows how likely materials are to gain or lose electrons.

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12
Q

Q12: What happens when a material gains electrons?

A

A12: It becomes negatively charged.

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13
Q

Q13: What happens when a material loses electrons?

A

A13: It becomes positively charged.

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14
Q

Q14: What are examples of power generation methods?

A

A14: Fossil fuels, nuclear, hydroelectric, wind, solar, and geothermal.

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15
Q

Q15: What are the environmental impacts of burning fossil fuels?

A

A15: Air pollution and greenhouse gas emissions.

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16
Q

Q16: What is a benefit of solar energy?

A

A16: It produces no pollution during operation.

17
Q

Q17: How does hydroelectric power work?

A

A17: Moving water spins turbines to generate electricity.

18
Q

Q18: What are insulators?

A

A18: Materials that do not let electricity flow, like rubber.

19
Q

Q19: What are conductors?

A

A19: Materials that allow electricity to flow, like metals.

20
Q

Q20: What are the main parts of a circuit?

A

A20: Power source, load, conducting wires, and a switch.

21
Q

Q21: What is a series circuit?

A

A21: A circuit where components are connected one after another.

22
Q

Q22: What is a parallel circuit?

A

A22: A circuit where components are connected in separate paths.

23
Q

Q23: What is a circuit diagram?

A

A23: A drawing that uses symbols to represent a circuit.

24
Q

Q24: What is electric current?

A

A24: The flow of electric charges through a circuit.

25
Q

Q25: What is the unit of electric current?

A

A25: Amperes (A).

26
Q

Q26: How is current measured?

A

A26: With an ammeter.

27
Q

Q27: What is potential difference?

A

A27: The energy per charge between two points in a circuit.

28
Q

Q28: What is the unit of potential difference?

A

A28: Volts (V).

29
Q

Q29: How is voltage measured?

A

A29: With a voltmeter.

30
Q

Q30: What happens to bulb brightness in a series circuit?

A

A30: Bulbs are dimmer because they share the same current.

31
Q

Q31: What happens to bulb brightness in a parallel circuit?

A

A31: Bulbs are brighter because each path gets full current.

32
Q

Q32: What happens when cells are added in series?

A

A32: Voltage increases.

33
Q

Q33: What happens when cells are added in parallel?

A

A33: Battery life increases, but voltage stays the same.

34
Q

Q34: What is resistance?

A

A34: The opposition to the flow of electric current.

35
Q

Q35: What is the unit of resistance?

A

A35: Ohms (Ω).

36
Q

Q36: What is the formula for resistance?

A

R = V/I (V = voltage, I = current)

37
Q

Q37: How does resistance affect current?

A

A37: Higher resistance decreases current.

38
Q

Q38: What does a straight line on a resistance graph mean?

A

A38: The resistance is constant.

39
Q

Q39: What does a curved line on a resistance graph mean?

A

A39: The resistance is changing.

Science finals - GR 9 (6 decks)

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