(a) Find the resistance that must be placed in parallel with a 31.0-Ω galvanometer having a 175-µA sensitivity to allow it to be used as an ammeter with a 20-A full-scale reading. (b) Find the resistance that must be placed in parallel to allow it to be used as an ammeter with a 100-mA full-scale reading.

(a) Find the resistance that must be placed in parallel with a 31.0-Ω galvanometer having a 175-µA sensitivity to allow it to be used as an ammeter with a 20-A full-scale reading. (b) Find the resistance that must be placed in parallel to allow it to be used as an ammeter with a 100-mA full-scale reading.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter21: Circuits And Dc Instruments

Section: Chapter Questions

Problem 47PE: Find the resistance that must be placed in paralled with a 25.0- galvanometer having a 50.0A...

See similar textbooks

Similar questions

Find the resistance that must be placed in paralled with a 25.0- galvanometer having a 50.0A sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 300-mA full-scale reading.
Person with body resistance between his hands of 10.0 kΩ accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) If the power supply is to be made safe by increasing its internal resistance, what should the internal resistance be for the maximum current in this situation to be 1.00 mA or less?
Find the resistance (in kΩ) that must be placed in series with a 25.0 Ω galvanometer having a 50.0 µA sensitivity (the same as the one discussed in the text) to allow it to be used as a voltmeter with a 0.410 V full-scale reading.
A person with body resistance between his hands of 10.0 kΩ accidentally grasps the terminals of a 20.0-kV power supply. (Do NOT do this!) If the internal resistance of the power supply is 2000Ω , what is the current through his body?
Power P0 = I0 ∆V0 is delivered to a resistor of resistance R0.If the resistance is doubled (Rnew = 2R0) while the voltageis adjusted such that the current is constant, what are theratios (a) Pnew /P0 and (b) ∆Vnew /∆V0? If, instead, the resistanceis held constant while Pnew = 2P0, what are the ratios(c) ∆Vnew /∆V0 , and (d) Inew /I0 ?
A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?
An astronaut uses a small motor, rated at 93% efficient, that is connected to a 12-volt [V] power supply on Mars. The motor has a resistance rating of 2.3 kiloohms [kΩ]. How long will it take to produce 3.4 calories [cal] of energy in units of minutes [min]?
Calculate the effective resistance (in kΩ) of a pocket calculator that has a 1.05 V battery and through which 0.225 mA flows.
Can a copper wire and an aluminum wire of the samelength have the same resistance? Explain
KINDLY ANSWR IMMEDIATELY, THANKYOU FOR HELPING OUT A cell has an emf of 1.54 V. When it is in series with a 1.0 ohm resistance, the reading of a voltmeter connected across the cell terminals is 1.40 V. Determine the cell's internal resistance. CHOICES: A. 0.010 ohm B. 0.050 ohm C. 0.10 ohm D. 0.50 ohm
A person notices a mild shock if the current along apath through the thumb and index finger exceeds 80. µA. Compare the maximum possible voltage without shock acrossthe thumb and index finger with a dry - skin resistance of 4.0 x105 Ω and a wet - skin resistance of 2.0 kΩ.
How do you find the value of a resistance R1, in a circuit when the equivalent resistance is 40 ohms, given that: R2 = 12 ohm in series with R3 = 40 ohms whom combined are in parallel with R4 = 20 ohms, all in parallel to R1. And to find the current in each resistor, do I just apply the equation, I = V/R, given that the circuit runs on an 28 volt batt.