5 Electricity

A lightbulb uses electrical energy to produce light. This energy can only flow in a closed circuit.

Substances that electrical currents can flow through easily are called Insulators.

Substances that electrical currents cannot flow through easily are called conductors.

37 kW = ........ W

452 mA = ...... A

0.008 A = ...... mA

0.3 A = ........ mA

Caitlin has an ammeter with three measurement ranges: 0-0.05 A, 0-0.5 A and 0-5 A. She wants to measure a current that is somewhere between 60 mA and 100 mA. Which range is best for her to use?

You have 5 Identical 1.5 V batteries. You have wired all 5 batteries in a series circuit. When you measure the voltage of the circuit you measure 4.5 V. Is this possible?

You have 5 Identical 1.5 V batteries. You have wired all 5 batteries in a series circuit. When you measure the voltage of the circuit you measure 4.5 V. How this possible?

The voltage and the current both refer to the way in which a flow of electricity transports energy. (Multiple answers are correct)

Draw a series circuit containing:

1 Battery,

3 Lightbulbs.

Draw a Parallel circuit containing:

1 battery,

3 Lightbulbs

3 lights are in a parallel circuit. If one lightbulb breaks, the two other will stop giving light.

Calculate the current at point B.

power (W) = voltage

Your phone has a capacity of 3000 mAh and runs on a voltage of 4.5 V. How long can your phone run when it has a powerconsumption of 1.35 W?

Your device needs atleast 1,0 V to operate. Which battery will run longer?

To recharge a mobile, you use an adapter that is plugged into the mains socket. What is one essential component of an adapter?