Lesson 7 — Practical

• Nask
• Middelbare school
• havo, vwo
• Leerjaar 2

Practical electricity

What are the two types of electrical charge?
Which particle causes each type of charge?
How do these electrical charges interact?

What is the unit of charge?

1. Coulomb (c)
2. Ampere (A)
3. Volt (V)
4. Watt (W)

What is the symbol for charge?

1. Q
2. C
3. I
4. e

Physical quantity

Unit

Physical quantity	Unit
time	seconds

Physical quantity	Unit
time	seconds
distance	meters

Physical quantity	Unit
time	seconds
distance	meters
speed	meter / second

Physical quantity	Unit
time	seconds
distance	meters
speed	meter / second
Charge	Coulomb

Physical quantity	Unit
time (t)	seconds (s)
distance (d)	meters (m)
speed (v)	meter / second (m/s)
Charge (Q)	Coulomb (C)

What is the unit of current?

1. Electrons (e)
2. Ampere (A)
3. Volt (V)
4. Coulomb (C)

What is the symbol for current?

1. Q
2. C
3. I
4. e

Give a precise definition of electric current.

An iPhone charger uses a current of 0.08 ampere when connected to a European socket. With this current it takes an iPhone 12, 2 hours and 8 minutes to go from 0% to 100%. How much coulomb flew through the wire in this time?

1. 576 C
2. 0.224 C
3. 614.5 C
4. 96000 C