4.

(A) Suppose at 37C the resistance of a platinum resistance thermometer is 137 . When placed in a particular solution, the resistance is 10+100 . What is the temperature of this solution? The temperature Coefficient of resistivity for platinum is 3.93 x 10 ^-3 1/^0Celius.

(B). A voltage 10 V is applied to a device of resistance R, and the current through the device is i. If the device obeys Ohm's law, what will be the outcome if the voltage is increased to 210 V?