The resistance of the wire in platinum resistance thermometer at ice p

1.	The resistance of the wire in platinum resistance thermometer at ice point is 3 Ω and at steam point is 9 Ω. When the thermometer is inserted in an unknown hot bath its resistance is found to be 12 Ω. The temperature of the hot bath is(a) 100° C(b) 50° C(c) 75° C(d) 150° C
Answer» Answer is : (d) 150° C For resistance thermometers \(t=\frac{R_t-R_{0^\circ}}{R_{100}-R_{0^\circ}}\times100^\circ\,C\) \(t=\frac{9}{6}\times100=150^\circ\,C\)

The resistance of the wire in platinum resistance thermometer at ice point is 3 Ω and at steam point is 9 Ω. When the thermometer is inserted in an unknown hot bath its resistance is found to be 12 Ω. The temperature of the hot bath is(a) 100° C(b) 50° C(c) 75° C(d) 150° C

Answer»

Answer is : (d) 150° C

For resistance thermometers

\(t=\frac{R_t-R_{0^\circ}}{R_{100}-R_{0^\circ}}\times100^\circ\,C\)

\(t=\frac{9}{6}\times100=150^\circ\,C\)

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The resistance of the wire in platinum resistance thermometer at ice point is 3 Ω and at steam point is 9 Ω. When the thermometer is inserted in an unknown hot bath its resistance is found to be 12 Ω. The temperature of the hot bath is(a) 100° C(b) 50° C(c) 75° C(d) 150° C

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