1.) Assume that you used your ammeter that you constructed to measure the curren

Question

1.) Assume that you used your ammeter that you constructed to measure the current through a 2 ohm resistor. Draw a diagram of the complete circuit. What percentage of the total resistance would be contributed by your ammeter?

2.) Assume that you used the voltmeter you constructed to measure the voltage across a 2 ohm resistor. Let the voltage be 5 volts. What percent of the total current flows through the voltmeter?

3.) Assume that you used the voltmeter you constructed to measure the voltage across a 200,000 ohm resistor. Let the voltage be 5 volts. What percent of the total current flows through the voltmeter?

4.) Explain why the percentage for question 3 is so large, and the percentage for question 2 is so small.

Explanation / Answer

1)   percentage of the total resistance = (r)/(r+2) * 100 %

2)   percent of the total current   = (I)/(I+2.5) * 100 %

3)    percent of the total current =    (I)/(I+2.5*10-5) * 100 %

4)    percentage for question 3 is so large, and the percentage for question 2 is so small. Because value of resistance is very large so,   very less current flows through it .

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