Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
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Chapter 31, Problem 6PLA
To determine
Whether the resistance must be place in series or in parallel with the galvanometer to construct a ammeter of a given full-scale deflection from it.
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What is the sensitivity of the galvanometer (that is, what current gives a full-scale deflection) inside a voltmeter that has a 25.0-k Ω resistance on its 100-V scale?
What is the sensitivity of the galvanometer (that is, what current gives a full-scale deflection) inside a voltmeter that has a 1.00-MΩ resistance on its 30.0-V scale?
The right side of the followingcircuit is in a B-field of strength 0.8T. Find the magnitude and directionof the force felt by the rightmostwire assuming the resistance is 8 Ω,L = 52 cm , and V = 9 V.
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- What could happen to the drift velocity of the electrons in awire and to the current in the wire if the electrons could movethrough it freely without resistance?arrow_forwardWhat condition is necessary for the sustained flow of water in a pipe? What analogous condition is necessary for the sustained flow of charge in a wire?arrow_forwardWill water flow more easily through a wide pipe or a narrow pipe? Will current flow more easily through a thick wire or a thin wire?arrow_forward
- When a voltmeter is connected across the terminals of a resistor, what usually happens to the potential difference across the resistor? What does the answer to this question suggest concerning a desirable design for voltmeters?arrow_forwardAn experimenter accidentally touches a 240 V dc line. If his skin resistance is 10 000 Ω, what value of current flows through his body? Is this dangerous?arrow_forwardIf a current of one- or two-tenths of an ampere were to flow into one of your hands and out the other, you would probably be electrocuted. But if the same current were to flow into your hand and out the elbow above the same hand, you would survive even though the current might be large enough to burn your flesh. Explain.arrow_forward
- Can an oscilloscope be used to directly measure current? Indirectly?arrow_forwardWhen a voltmeter is connected across the terminals of a resistor, what usually happens to the potential difference across the resistor? What does the answer to this question suggests concerning a desirable design for voltmeters?arrow_forwardIs it possible to connect a group of resistors of value R in such a waythat the equivalent resistance is less than R? If so, give a specificexamplearrow_forward
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