Measuring current current is measured in amperes amperes
- Slides: 18
Measuring current: • current is measured in amperes • amperes is often abbreviated to amps or A • the current flowing through a component in a circuit is measured using an ammeter • the ammeter must be connected in series with the component
Measuring voltage Voltage is the measure of potential difference. It tells us how much ‘push’ is left in the circuit. Cells or batteries often provide the voltage. Measuring potential difference: • voltage is measured in volts, V • voltage across a component in a circuit is measured using a voltmeter • the voltmeter must be connected in parallel with the component
Electricity bingo Draw a grid of 9 squares like the one opposite. Choose 9 answers from below and put one in each square. Parallel, Series, Current, Voltmeter, Ammeter, Low-energy light bulbs, Fuse, Copper, Potential difference, Battery, Energy, Lamp, Negative, Amp, Volt. Cross off the answers as the questions matching them appear on the slides, when you have crossed all nine off, shout ‘bingo’ © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What is the unit of current? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
Wires are made from this type of metal? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
How is a voltmeter connected? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
Which component is used to measure current? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What is the unit of voltage? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
How is an ammeter connected? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
This emits (gives out) less energy than traditional light bulbs? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What can be defined as a flow of electrons? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What would you connect to find out the voltage in a circuit? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
A piece of wire that glows if the current is too high? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What is made when several cells are joined together? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What is the proper name for voltage? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What do electrons carry in a circuit? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
Which component converts electrical energy to light energy? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
What charge do electrons have? © Teachable and Joanne Holloway. Some rights reserved. http: //teachable. net/res. asp? r=480
Current is measured in
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Magnetostatic field
Amperes law
If 200 amperes flow from the positive terminal
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Eddy current damping in measuring instruments
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Drift current density unit
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Line current and phase current
Drift current and diffusion current in semiconductor
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Energy band diagram of pn junction diode
