dave connects an electric circuit to find the resistance of 100 cm of wire. the battery voltage is 9V. the ammeter is 2A. and the voltmeter is 5V. what is the resistance of the 100cm of wire

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dave connects an electric circuit to find the resistance of 100 cm of wire. the battery voltage is 9V. the ammeter is 2A. and the voltmeter is 5V. what is the resistance of the 100cm of wire

20
12 Dave connects an electric circuit to find the resistance of 100cm of wire.
Look at the diagram below.
9V
100 cm of wire
The battery voltage is 9V.
The reading on the ammeter is 2A.
The reading on the voltmeter is 5V.
(a) Calculate the resistance of the 100 cm of wire.
(b) Dave now uses some thinner wire.
A 100 cm length of this wire has a resistance of 5 ohms.
What length of this wire is needed to mako a 2 ohm resistor?
Transcribed Image Text:20 12 Dave connects an electric circuit to find the resistance of 100cm of wire. Look at the diagram below. 9V 100 cm of wire The battery voltage is 9V. The reading on the ammeter is 2A. The reading on the voltmeter is 5V. (a) Calculate the resistance of the 100 cm of wire. (b) Dave now uses some thinner wire. A 100 cm length of this wire has a resistance of 5 ohms. What length of this wire is needed to mako a 2 ohm resistor?
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