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Flashcards in Circuits - The Basics Deck (13)
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1

What do you use a standard test circuit for?

Finding the resistance of a component

2

How do you find the resistance of a component?

By measuring the current through and the potential difference across the component

3

Draw the standard test circuit

4

What does an ammeter measure?

The current (in amps) flowing through the component

5

Name the 2 facts about where to position an ammeter

1. Must be placed in series

2. Can be put anywhere in series in the main circuit, but never in parallel like the voltmeter

6

What does the volt meter measure?

Potential difference (in volts) across the component

7

Name the 2 important things to remember about the positioning of the voltmeter

1. Must be placed in parallel around the component under test

2. NOT around the variable resistor or the battery!

8

What 2 things are standard test cirsuits used for?

1. Testing components

2. Getting V-I graphs

9

Can the component, ammeter, and variable resitistor be put anywhere in a standard test circuit?

Why?

YES

Because they are all in series

10

Where must the voltmeter be positioned in a standard test circuit?

In parallel around the component under test

11

As you vary the variable resistor it ____ ____ ____ flowing through the circuit.

As you vary the variable resistor it alters the current flowing through the circuit

12

As you vary the variable resistor it alters the current flowing through the circuit

What does this let you do?

Take several pairs of readings from the ammeter and voltmeter

13

What can you plot values for current and voltage on?

What do these let you do?

V-I graphs

Find the resistance