C4.1 Electrical charge and voltage (2)

• Natuurkunde
• Middelbare school
• havo, vwo
• Leerjaar 3

Exercise electricity

H4.1 Electrical charge and voltage

Protons have a .... charge

1. negative
2. positive
3. neutral

Objects attract each other if ...

1. their charges are like
2. their charges are opposite

To create a negative charge ..

1. You need to add protons
2. You need to remove protons
3. You need to add electrons
4. You need to remove electrons

If your rub a balloon over your hair, the balloon will become negatively charged. Because it's statically charged you can "stick" the balloon to a wall or ceiling. Explain why this is possible.

The voltage on the power socket is 230 volt. Write this down in symbols.

The symbol of voltage is

1. U
2. V
3. R
4. A

The unit of current is...

1. Volt
2. Amps
3. Coulomb
4. Ohm

Electrical current means ...

1. the energy per electron
2. the amount of electrons per second
3. the energy per second

91 V is equal to

1. 9,1 mV
2. 91 mV
3. 91000 mV
4. 0,091 mV

56 mA is gelijk aan

1. 0,056 A
2. 0,56 A
3. 5,6 A
4. 560 A

U = 9,0 V
R = 30 mΩ
I = ?

1. 300 A
2. 300 mA
3. 270 A
4. 0,27 A

R = 4 Ω
I = 8,6 mA
U = ?

1. 34 V
2. 0,0344 V
3. 465 V
4. 34,4 V