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JAMB Physics 2019 Paper
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© africaexams.com
Question : 26
Total: 100
A thermocouple thermometer is connected to a millivoltmeter which can read up to 10mV. When one junction is in ice at 0°C and the other is steam at 100°C, the millivoltmeter reads 4mV. What is the maximum temperature which this arrangement can measure
100
o
C
248
o
C
250
o
C
350
o
C
Validate
Solution:
t
θ
- t
o
= 10,
t
100
- t
o
= 4
θ
=
t
θ
- t
o
t
100
- t
o
×
100
10
4
×
100
=
250°C
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