Chapter 4 - Energy & Electricity

Question 1

How is a positive charge created?

Answer 1

It’s created by a loss of electrons

Question 2

How is a negative charge created?

Answer 2

It’s created by a gain of electrons

Question 3

Do opposite charges attract or repel?

Answer 3

They attract😏

Question 4

Do similar charges attract or repel?

Answer 4

They repel😔

Question 5

What is friction?

Answer 5

Rubbing 2 neutral substances together, causing a transfer of electrons

Question 6

What is conduction?

Answer 6

Touching a neutral object ( #electrons = #protons) with a charged object. In the end, both objects will be charged.

Question 7

What is induction?

Answer 7

Approaching (no actual contact) a charged object to a neutral one creating a partial charge in the object (still neutral)

Question 8

Where are ammeters connected in a circuit?

Answer 8

They are connected in series so on the same path as the device

Question 9

Where are voltmeters connected in a circuit?

Answer 9

They are connected in parallel so it’s on its own path around the device

Question 10

What are the units for the equation. V = I x R? What does each letter represent?

Answer 10

V = voltage or potential difference (V)
I = current intensity (A)
R = resistance (Ω)

Question 11

What are the units for the equation P = V x I? What does each letter mean?

Answer 11

P = power (watts - W)
V = voltage or potential difference (V)
I = current intensity (A)

Question 12

What are the units for the equation E = P x Δt in joules? What does each letter/symbol mean?

Answer 12

E = energy (J)
P = power (watts - W)
Δt = time (seconds - s)

Question 13

What are the units for the equation E = P x Δt in kilo watts (kWh)? What does each letter/symbol mean?

Answer 13

E = energy (kWh)
P = power (kW)
Δt = time (hours - h)