12

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter9: Condensed Matter Physics

Section: Chapter Questions

Problem 74P: Show that for V less than zero, InetI0.

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Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

Given the circuit below where a battery with EMF 12 V and internal resistance 2 ohms is energizing a 4-ohm resistor, what will be the current and voltage Va-b?

а
+l'12 V
a'
b'
O 1.5 A;
O 2 A;
O 1.75 A;
O 2.5 A;

a
b
+
12 V
a'
4Ω
b'
O 8 V;
O 9 V;
O 7V;
O 6 V;

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