Working with electrical magnitudes: Voltage, Intensity of current (Current) and Resistance. We have 2 possibilities:
- Measuring voltage and current in a circuit. For that you must use a voltmeter and an ammeter.
- Using Ohm's Law to calculate voltage, current or resistance knowing one of them.
Activity 1. Measuring.
- First draw the circuit below using the online simulator.
- Then place an ammeter to measure the current through the circuit (the current through the lamp and through the resistor).
- Place a voltmeter to measure the voltage drop across the lamp.
- Place a voltmeter to measure the voltage drop across the resistor.
- Think of the voltage drop across the motor (the second lamp) taking into account the previous measurements.
Activity 2. Complete the activity from this Worksheet (complete only page 1)
- Enter your group name for both user and password.
- Complete the sheet by fill in the blanks. When finished click on Finish!! and your sheet will be recorded.
- Finally log out of the website and move on to next activity.
Activity 2. Using Ohm's Law.
- Now use the app next to the circuit to check that the Ohm's Law works.
- Finally calculate the resistance of the lamp using the formula and the calculator below.
- Take a screenshot of your circuit (don't forget the lamp with your number) and upload it to your Classroom/unit4_2/Paper_Ohms.