Figure 1 shows an experimental setup to be used in identifying the value of unknown resister,...
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Figure 1 shows an experimental setup to be used in identifying the value of unknown resister, R. Internal resistance of Voltmeter is 0.5 ko. Observations are as follows, Voltmeter Reading  100 V Ammeter Reading  12 A A R V E I. Calculate the resistance using meter readings. II. Calculate the percentage error of the above method if the exact value of the resistance is 4.5 Ω. Briefly describe the most probable reason for having such a value for error percentage. III. IV. Suggest a modification to the above circuit to minimize the error percentage. Calculate the new value of error percentage for the circuit you have suggested. V. Later, the unknown resistor, R was measured using a Kelvin Double Bridge circuit. Draw the circuit diagram and derive an expression to determine R, if the outer ratio and the inner ratio are equal. Calculate the unknown resistance if the standard resistance is 0.471 N and the outer ratio is 10. VI. Briefly explain how the Loss of Charge Method can be used to measure unknown resistance. VII. A resistor is connected in parallel with a capacitor of 0.22 µF and it is allowed to charge to a voltage of 400 V. After the supply is disconnected, it is found that the terminal voltage falls to 250 V in 90 seconds. Calculate the value of the unknown resistor assuming that the capacitor does not possess any leakage. Figure 1 shows an experimental setup to be used in identifying the value of unknown resister, R. Internal resistance of Voltmeter is 0.5 ko. Observations are as follows, Voltmeter Reading  100 V Ammeter Reading  12 A A R V E I. Calculate the resistance using meter readings. II. Calculate the percentage error of the above method if the exact value of the resistance is 4.5 Ω. Briefly describe the most probable reason for having such a value for error percentage. III. IV. Suggest a modification to the above circuit to minimize the error percentage. Calculate the new value of error percentage for the circuit you have suggested. V. Later, the unknown resistor, R was measured using a Kelvin Double Bridge circuit. Draw the circuit diagram and derive an expression to determine R, if the outer ratio and the inner ratio are equal. Calculate the unknown resistance if the standard resistance is 0.471 N and the outer ratio is 10. VI. Briefly explain how the Loss of Charge Method can be used to measure unknown resistance. VII. A resistor is connected in parallel with a capacitor of 0.22 µF and it is allowed to charge to a voltage of 400 V. After the supply is disconnected, it is found that the terminal voltage falls to 250 V in 90 seconds. Calculate the value of the unknown resistor assuming that the capacitor does not possess any leakage.
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PQpq of load resistance r R100471471Ohm 6LOSS OF CHARGE METHOD C is a known capacitance V is electro... View the full answer
Related Book For
Materials Science and Engineering An Introduction
ISBN: 9780470419977
8th edition
Authors: William D. Callister Jr., David G. Rethwisch
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