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Two resistance thermometers are made, one of the platinum wire and the other of germanium wire. The resistance of both the thermometers are equal at room temperature. The two resistance wires are connected to a battery. Now the two resistance wires are heated to 100oC. The potential drop in the two resistance is measured. Which of the following statement is correct
a. The potential drop across the platinum wire is eqaul to the potential drop across the germanium wire
b. The potential drop across the platinum wire is greater than that acorss germanium
c. The potential drop across the platinum wire is less than that across germanium
d. The nature of the potential drop cannot be ascertained unless the magnitude of the current is known?
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Two resistance thermometers are made, one of the platinum wire and the...
Analysis of Potential Drop in Resistance Thermometers

Equal Resistance at Room Temperature
- Initially, the resistance of both platinum and germanium resistance thermometers is equal at room temperature.
- This implies that the potential drop across both wires is also equal when connected to a battery.

Heating to 100oC
- When the resistance wires are heated to 100oC, their resistances change due to the temperature coefficient of resistance.
- Platinum has a lower temperature coefficient of resistance compared to germanium, resulting in a smaller increase in resistance for platinum compared to germanium.

Effect on Potential Drop
- As resistance increases, the potential drop across the resistance wire also increases, according to Ohm's Law (V = IR).
- Therefore, the potential drop across the platinum wire will be less than that across the germanium wire when heated to 100oC.

Correct Answer
- The correct statement is: c. The potential drop across the platinum wire is less than that across germanium.
- This is because the change in resistance for platinum is smaller than that for germanium when heated, resulting in a lower potential drop across the platinum wire.
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Two resistance thermometers are made, one of the platinum wire and the other of germanium wire. The resistance of both the thermometers are equal at room temperature. The two resistance wires are connected to a battery. Now the two resistance wires are heated to 100oC. The potential drop in the two resistance is measured. Which of the following statement is correcta. The potential drop across the platinum wire is eqaul to the potential drop across the germanium wireb. The potential drop across the platinum wire is greater than that acorss germaniumc. The potential drop across the platinum wire is less than that across germaniumd. The nature of the potential drop cannot be ascertained unless the magnitude of the current is known?
Question Description
Two resistance thermometers are made, one of the platinum wire and the other of germanium wire. The resistance of both the thermometers are equal at room temperature. The two resistance wires are connected to a battery. Now the two resistance wires are heated to 100oC. The potential drop in the two resistance is measured. Which of the following statement is correcta. The potential drop across the platinum wire is eqaul to the potential drop across the germanium wireb. The potential drop across the platinum wire is greater than that acorss germaniumc. The potential drop across the platinum wire is less than that across germaniumd. The nature of the potential drop cannot be ascertained unless the magnitude of the current is known? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Two resistance thermometers are made, one of the platinum wire and the other of germanium wire. The resistance of both the thermometers are equal at room temperature. The two resistance wires are connected to a battery. Now the two resistance wires are heated to 100oC. The potential drop in the two resistance is measured. Which of the following statement is correcta. The potential drop across the platinum wire is eqaul to the potential drop across the germanium wireb. The potential drop across the platinum wire is greater than that acorss germaniumc. The potential drop across the platinum wire is less than that across germaniumd. The nature of the potential drop cannot be ascertained unless the magnitude of the current is known? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two resistance thermometers are made, one of the platinum wire and the other of germanium wire. The resistance of both the thermometers are equal at room temperature. The two resistance wires are connected to a battery. Now the two resistance wires are heated to 100oC. The potential drop in the two resistance is measured. Which of the following statement is correcta. The potential drop across the platinum wire is eqaul to the potential drop across the germanium wireb. The potential drop across the platinum wire is greater than that acorss germaniumc. The potential drop across the platinum wire is less than that across germaniumd. The nature of the potential drop cannot be ascertained unless the magnitude of the current is known?.
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