TS EAMCET · Physics · Current Electricity
When subjected to a voltage of \(10 \mathrm{~V}\), the current through a resistor at a temperature of \(40^{\circ} \mathrm{C}\) is \(0.1 \mathrm{~A}\). The temperature coefficient of resistance of the material of the resistor is \(2 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}\). The temperature of the resistor in \({ }^{\circ} \mathrm{C}\) when the current drops to \(0.098 \mathrm{~A}\) is
- A 142
- B 167
- C 181
- D 206
Answer & Solution
Correct Answer
(A) 142
Step-by-step Solution
Detailed explanation
Given, voltage, \(V_1=10 \mathrm{~V}\), current through resistor, \(I_1=0.1 \mathrm{~A}\), temperature, \(t_1=40^{\circ} \mathrm{C}\) and temperature coefficient, \(\alpha=2 \times 10^{-4}{ }^{\circ} \mathrm{C}^{-1}\) \(\therefore\) Resistance of resistor at…
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