Physics/Electricity

Question 1

Q1: What is electricity?

Answer 1

A1: The flow of electric charge.

Question 2

Q2: What is static electricity?

Answer 2

A2: A buildup of electric charge on a surface.

Question 3

Q3: What is current electricity?

Answer 3

A3: The flow of electric charges through a conductor.

Question 4

Q4: What are the three subatomic particles?

Answer 4

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

Question 5

Q5: What is the force of electricity?

Answer 5

A5: The force that attracts or repels charges.

Question 6

Q6: What are the two types of charges?

Answer 6

A6: Positive and negative.

Question 7

Q7: What do like charges do?

Answer 7

A7: They repel.

Question 8

What do opposite charges do?

Answer 8

Attract

Question 9

Q9: What is the law of electric charges?

Answer 9

A9: Opposite charges attract; like charges repel.

Question 10

Q10: How is static charge created?

Answer 10

A10: By rubbing two objects together, transferring electrons.

Question 11

Q11: What is the electrostatic series?

Answer 11

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

Question 12

Q12: What happens when a material gains electrons?

Answer 12

A12: It becomes negatively charged.

Question 13

Q13: What happens when a material loses electrons?

Answer 13

A13: It becomes positively charged.

Question 14

Q14: What are examples of power generation methods?

Answer 14

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

Question 15

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

Answer 15

A15: Air pollution and greenhouse gas emissions.

Question 16

Q16: What is a benefit of solar energy?

Answer 16

A16: It produces no pollution during operation.

Question 17

Q17: How does hydroelectric power work?

Answer 17

A17: Moving water spins turbines to generate electricity.

Question 18

Q18: What are insulators?

Answer 18

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

Question 19

Q19: What are conductors?

Answer 19

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

Question 20

Q20: What are the main parts of a circuit?

Answer 20

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

Question 21

Q21: What is a series circuit?

Answer 21

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

Question 22

Q22: What is a parallel circuit?

Answer 22

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

Question 23

Q23: What is a circuit diagram?

Answer 23

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

Question 24

Q24: What is electric current?

Answer 24

A24: The flow of electric charges through a circuit.

Question 25

Q25: What is the unit of electric current?

Answer 25

A25: Amperes (A).

Question 26

Q26: How is current measured?

Answer 26

A26: With an ammeter.

Question 27

Q27: What is potential difference?

Answer 27

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

Question 28

Q28: What is the unit of potential difference?

Answer 28

A28: Volts (V).

Question 29

Q29: How is voltage measured?

Answer 29

A29: With a voltmeter.

Question 30

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

Answer 30

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

Question 31

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

Answer 31

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

Question 32

Q32: What happens when cells are added in series?

Answer 32

A32: Voltage increases.

Question 33

Q33: What happens when cells are added in parallel?

Answer 33

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

Question 34

Q34: What is resistance?

Answer 34

A34: The opposition to the flow of electric current.

Question 35

Q35: What is the unit of resistance?

Answer 35

A35: Ohms (Ω).

Question 36

Q36: What is the formula for resistance?

Answer 36

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

Question 37

Q37: How does resistance affect current?

Answer 37

A37: Higher resistance decreases current.

Question 38

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

Answer 38

A38: The resistance is constant.

Question 39

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

Answer 39

A39: The resistance is changing.