A 30-ohm resistor and a 60-ohm resistor are connected as shown above to a battery of Voltage of 20 volts and internal resistance r. The current in the circuit is 0.8 ampere. What is the value of r? 20 V 0.8 A 30 2 C 60 N O 0.22 0 O 4.5 0 O 50 O 16 0

A 30-ohm resistor and a 60-ohm resistor are connected as shown above to a battery of Voltage of 20 volts and internal resistance r. The current in the circuit is 0.8 ampere. What is the value of r? 20 V 0.8 A 30 2 C 60 N O 0.22 0 O 4.5 0 O 50 O 16 0

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 67PQ

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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

A 30-ohm resistor and a 60-ohm resistor are connected as shown above
to a battery of Voltage of 20 volts and internal resistance r. The current in
the circuit is .8 ampere. What is the value of r?
20 V
0.8 A
30 2
60 2
0.22 Q
4.5 Q
50
O 16 0
ww

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