She uses a voltmeter, that measures in volts, and an ammeter that measures in amps. Both were correctly placed in her circuit. In her notes she wrote x = 0.15 z = 0.3 but did not indicate volts or amps, or which meter was which. The resistor on the left is 5 ohms. (A) Which was the ammeter? explain. (B) What is the voltage difference across each resistor? Explain. (C) What is the voltage of the battery? Explain.

A) the ammeter is x  

B)

C) 1.05 V

Explanation:

From the diagram attached below;

A) Assuming the homes were wired in series, and one of the homes face short circuit then all the houses would face power cut but it doesn't happen. So they must be connected in parallel.

Therefore; The ammeter is  connected in series, Hence, the ammeter is x  and the voltmeter must be z.

B)

Given that:

x = 0.15 A

z = 0.3 V

Resistor (R) on the left = 5 ohms

Then, voltage across R₁ (left resistor) = 5×(x)

= 5×0.15

= 0.75 V

voltage across the right one = z = 0.3 V

C)

The total voltage of battery = 0.75+0.3 = 1.05 V

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the independent variable, or the one that is intentionally manipulated is the speed.