R E Figure 21.43 A switch is ordinarily in series with a resistance and voltage source. Ideally, the switch has nearly zero resistance when closed but has an extremely large resistance when open. (Note that in this diagram, the script E represents the voltage (or electromotive force) of the battery.)
R E Figure 21.43 A switch is ordinarily in series with a resistance and voltage source. Ideally, the switch has nearly zero resistance when closed but has an extremely large resistance when open. (Note that in this diagram, the script E represents the voltage (or electromotive force) of the battery.)
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Why is the power dissipated by a closed switch, such as in Figure 21.43, small?
![R
E
Figure 21.43 A switch is ordinarily in series with a resistance
and voltage source. Ideally, the switch has nearly zero
resistance when closed but has an extremely large resistance
when open. (Note that in this diagram, the script E represents
the voltage (or electromotive force) of the battery.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F932bf06c-0e95-483b-bfd6-70eca04f15c7%2Fc41707d8-e7ac-4c9c-b1b9-97351003f85a%2F0h8uvol_processed.png&w=3840&q=75)
Transcribed Image Text:R
E
Figure 21.43 A switch is ordinarily in series with a resistance
and voltage source. Ideally, the switch has nearly zero
resistance when closed but has an extremely large resistance
when open. (Note that in this diagram, the script E represents
the voltage (or electromotive force) of the battery.)
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