The value of R1, R2, and R3 in circuit.
Answer to Problem 69QAP
R1, R2, and R3 are 27-ohm, 108 ohm and 108 ohm.
Explanation of Solution
Given:
Voltage present in circuit, Vb= 9 V
Power dissipated in each resistor, P1= P2 = P3 = 1.50 W
Formula used: Power dissipates across resistor
Where, P is power dissipated
V = Voltage across resistor
I = Current flowing through resistor
R = Resistance..
Equivalent resistance, when resistance connects in series
Equivalent resistance, when resistance connects in parallel
Equivalent power, when resistance connects in series
Equivalent power, when resistance connects in parallel
Figure:
.
.
.
Calculation:
In figure (1)
Power in each resistance is equal..
Equivalent Power of R2and R3
Equivalent resistance of R2and R3
In figure (2)
Current flowing through resistance
On comparing equation (d) and (e)
So, equivalent resistance of circuit
Equivalent power of circuit
In figure (3)
From equation (f),
From equation (a),
Conclusion:
Thus, the value of
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Chapter 18 Solutions
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