(a)
The value of the current in ammeter
(a)
Answer to Problem 112P
The value of the current in ammeter
Explanation of Solution
Write the expression for the current through the ammeter
Here,
Write the expression for the equivalent resistance.
Here,
Use equation (II) in (I) to solve for
Conclusion:
Substitute
Therefore, the value of the current in ammeter
(b)
The value of the current in ammeter
(b)
Answer to Problem 112P
The value of the current in ammeter
Explanation of Solution
Write the expression for the resistance across the branch through the ammeter
Write the expression for the potential difference right to the ammeter
Write the expression for the current through the ammeter
Use equation (IV) and (V) in (VI) to solve for
Conclusion:
Substitute
Therefore, the value of the current in ammeter
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Chapter 18 Solutions
Physics
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- Three identical 60.0-W, 120-V lightbulbs are connected across a 120-V power source as shown in Figure P28.72. Assuming the resistance of each lightbulb is constant (even though in reality the resistance might increase markedly with current), find (a) the total power supplied by the power source and (b) the potential difference across each lightbulb.arrow_forwardConsider the circuit shown in the preceding problem. Write equations for the power supplied by the voltage sources and the power dissipated by the resistors in termsarrow_forwardWhen an unknown resistance Rxis placed in a Wheatstone bridge, it is possible to balance the bridge by adjusting to be 2500 . What is Rxif R2R1 = 0.625?arrow_forward
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