Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Textbook Question
Chapter 31, Problem 7PLA
A galvanometer has Rg = 150 Ω and K = 0.750 × 10−4 A/div. The galvanometer has five divisions for a full-scale reading (i.e., N = 5). What value of resistance is needed, and how must it be connected to the galvanometer to form a full-scale voltmeter of 20.0 V? Show your work.
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A) A car headlight filament is made of tungsten and has a cold resistance of 0.350 Ω. If the filament is a cylinder 4.00 cm long, what is its diameter?
B) Two charges Q1 &Q2 are separated by a distance D. If both charges are doubled, and distance is increased to 2D, what happens to the force between the charges? Show your work.
Carry out part c make the missing answer in the image, place step by step to arrive at the result.
What If? How would the readings in the ammeter (in mA) and voltmeter (in volts) change if the 4.50 V battery was flipped so that its positive terminal was to the right?
Answer: ideal ammeter_______ mA
A wire of length 10.0 m has a resistance of 2.75 ohm. What is the resistance of a piece ofthat same wire whose length is 25.0 m? Show your work.
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