# Circuits (1)

Fill in the following gap text with the correct terms from the list given at the end. The terms can not be used at all or multiple times.

A circuit consists of the be >_________________, which are linked by a _________________ and at least one _________________. In such a circuit, _________________, _________________, and _________________ are dependent relationships called _________________. The smaller _________________, the smaller _________________, if _________________ stays the same.

Choices: Resistance R / Voltage source / Ohm’s law / Pythagorean law / Voltage U / Energy Consumption Rate / Electrical Conductor (s) Mass (s) Amperage I / (s) Temperature

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## exercise 2

Electricity flows through an electrical conductor.

1. What exactly is electric current?
2. What must be available for electrical current to flow??
3. Why is it important to have at least one resistor built into a circuit??
4. Which sensible or measurable effect does electrical current have? Give an example from everyday life.

1. Write the name of the electrical component next to the symbol shown.
2. Draw a circuit with two bulbs in series, in which the partial voltages are measured with one voltmeter each.

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1. Which current flows when R1 is switched off??
2. Which current flows when R1 is switched on??
3. Justify the difference.

The voltage should be changed gradually and the current should be measured.

Complete the following table. Put the dots in the diagram and connect them afterwards.

 U in V 1 2 3 4 5 6 I in A

• Fred and Mariana work on their circuit in the lab. As they freeze, they get a heat lamp from the basement and switch it on next to them. Changes due to the possible heat supply the U-I-Curve? If so, draw it in the picture.