In the figure, R, = 48 2, wiwwwn w 24a are R, Rz R3 R, = 72 o and R3 = 24 a are connected across points "a" and "b". A potential difference V = 432 volts is applied across the system . What is the power dissipation in resistor R,? (in watts) %3D %3D

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
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In the figure,
R, = 48 2,
wiwwwn w 24a are
R,
Rz
R3
R, = 72 o and
R3 = 24 a are
connected across points "a" and "b". A potential difference V = 432 volts is applied
across the system . What is the power dissipation in resistor R,? (in watts)
%3D
%3D
Transcribed Image Text:In the figure, R, = 48 2, wiwwwn w 24a are R, Rz R3 R, = 72 o and R3 = 24 a are connected across points "a" and "b". A potential difference V = 432 volts is applied across the system . What is the power dissipation in resistor R,? (in watts) %3D %3D
Expert Solution
Step 1

The three resistors are connected in series,

Equivalent resistance = R1+R2+R3 = 48+72+24 = 144 Ohms

Potential Difference = 432 Volts

If resistors are connected in series , current through them will remain the same.

Current is common for all the resistors connected in series.

 

Let  I be the current in the circuit

we have ,

V eq  = I* Req

I = 432/144 = 3 A

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