Resistance Thermometers

Q.

The resistance of pure platinum increases linearly with temperature (over a small range). We can use this property to measure temperature of different bodies, relative to a scale.

If we scale the thermometer such that a resistance of 80 Ω denotes $0^{o}C$ and 90 Ω denotes ${100}^{o}C$, what temperature will a resistance of 86 Ω denote?

1. 40⁰C

2. 50⁰C

3. 60⁰C

4. 80⁰C

Q.

The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at ${10}^{\circ }Cand{100}^{\circ }C$. The temperature at which the resistance is 3.26 ohm is

1. ${40}^{\circ }C$

2. ${50}^{\circ }C$

3. ${60}^{\circ }C$

4. ${70}^{\circ }C$

Q. The temperature coefficient of resistance of a wire is 0.00125 per ${}^{\circ }C$. At 300K its resistance is 1$\Omega$. The resistance of wire will be 2$\Omega$ at

1. 1154K
2. 1100K
3. 1400K
4. 1127K

Q. The temperature coefficient of resistance of a wire is 0.00125 per ${}^{\circ }C$. At 300K its resistance is 1$\Omega$. The resistance of wire will be 2$\Omega$ at

1. 1154K
2. 1100K
3. 1400K
4. 1127K

Q. The temperature coefficient of resistance of a wire is 0.00125 per ${}^{\circ }C$. At 300K its resistance is 1$\Omega$. The resistance of wire will be 2$\Omega$ at

1. 1154K
2. 1100K
3. 1400K
4. 1127K