H4 Elektriciteit

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 2

Ch.4 Electricity

Review questions

Which particles move with an electrical current?

1. Molecules
2. Atoms
3. Electrons
4. Cells

A substance that the electrical current can easily flow through is called ...........

1. an insulator
2. an isolator
3. a collector
4. a conductor

A substance that the electrical current can not easily flow through is called ...............

1. an insulator
2. an isolator
3. a collector
4. a conductor

What is the symbol for voltage?

1. P
2. U
3. I
4. t

What is the symbol for current?

1. P
2. U
3. I
4. t

What is the unit for power?

1. Amps
2. Volt
3. Watt
4. Hours

What is the definition of power?

1. The amount of current that an appliance uses.
2. The amount of current that an appliance uses per second.
3. The amount of electrical energy that an appliance uses.
4. The amount of electrical energy that an appliance uses per second.

Place the correct symbol behind the electrical components

Battery

Wire

Switch

Light bulb

LED

Mains socket

Place the correct amount of power next to the light bulbs

Lamp a

Voltage:  2.4 V

Current:  500 mA

Lamp b

Voltage:  9 V

Current:  700 mA

Lamp c

Voltage:  12 V

Current:  4.0 A

6300 W

1,2 W

1200 W

48 W

6,3 W

Jocelyn: In a parallel circuit you can turn the light on and off independently.

Tessa: If one lamp in a parallel circuit breaks, all lights turn off.

Who is right?

1. Both are incorrect
2. Only Jocelyn
3. Only Tessa
4. Both Jocelyn and Tessa are right.

All light bulbs in this circuit are identical. The total current is 8 amps. What is the current in each light bulb?

All light bulbs in this circuit are identical. The battery voltage is 4 Volts. What is the voltage in each light bulb?

All light bulbs in this circuit are identical. The total current is 6 amps. What is the power of each light bulb?

Calculate the power of light bulb # 2