Multiple Choice
A platinum wire is used to determine the melting point of indium.The resistance of the platinum wire is 2.000 Ω at 20°C and increases to 3.072 Ω as the indium starts to melt.What is the melting point of indium? The temperature coefficient of resistivity for platinum is
A) 120°C
B) 140°C
C) 160°C
D) 240°C
E) 350°C
Correct Answer:

Verified
Correct Answer:
Verified
Q30: A piece of wire 58.4 cm long
Q31: A cylindrical wire has a resistance R
Q32: The emf and the internal resistance of
Q33: As current flows through a uniform wire,the
Q34: The diameter of a 12-gauge copper wire
Q36: The temperature coefficient of resistivity for copper
Q37: When a potential difference of 10 V
Q38: A silver wire with resistivity <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB6394/.jpg"
Q39: A 110-V hair dryer is rated at
Q40: In a certain electroplating process gold is