Q5 (a) The unknown low-value resistance (R,) was measured using an ammeter-voltmetermethod with a voltmeter sensitivity of 150 Q/V and an ammeter resistance of 0 2.Calculate the actual value of Rx if the voltmeter reading is 2.8 V on its 3-V range andthe ammeter reading is 0.5 A.(b) A loss and charge method is one of the well-known methods for high resistancemeasurement.(i)Describe the operation of the loss of charge method with the help of aschematic diagram.(ii) An insulation test measures the capacitance of 800 pF between the conductorand earth. It was observed that after charging the cable with a voltage supplyof 500 V for a sufficiently long time, when the voltage supply is withdrawn,the voltage drops down to 160 V in 60 seconds. Determine the insulationresistance of the cable.

5) (a) Low value resistance measurement using ammeter- voltmeter method To calculate the actual…

Q5 (a) The unknown low-value resistance (R,) was measured using an ammeter-voltmeter method with a voltmeter sensitivity of 150 Q/V and an ammeter resistance of 0 Q. Calculate the actual value of Rx if the voltmeter reading is 2.8 V on its 3-V range and the ammeter reading is 0.5 A.

Q5 (a) The unknown low-value resistance (R,) was measured using an ammeter-voltmeter method with a voltmeter sensitivity of 150 Q/V and an ammeter resistance of 0 Q. Calculate the actual value of Rx if the voltmeter reading is 2.8 V on its 3-V range and the ammeter reading is 0.5 A.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter29: Dc Generators

Section: Chapter Questions

Problem 1PA: You are working as an electrician in a large steel manufacturing plant, and you are in the process...

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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

Question

Q5 (a) The unknown low-value resistance (R,) was measured using an ammeter-voltmeter
method with a voltmeter sensitivity of 150 Q/V and an ammeter resistance of 0 2.
Calculate the actual value of Rx if the voltmeter reading is 2.8 V on its 3-V range and
the ammeter reading is 0.5 A.
(b) A loss and charge method is one of the well-known methods for high resistance
measurement.
(i)
Describe the operation of the loss of charge method with the help of a
schematic diagram.
(ii) An insulation test measures the capacitance of 800 pF between the conductor
and earth. It was observed that after charging the cable with a voltage supply
of 500 V for a sufficiently long time, when the voltage supply is withdrawn,
the voltage drops down to 160 V in 60 seconds. Determine the insulation
resistance of the cable.

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