Pick up the correct statement a) Sun’s temperature is measured by a pyrometer b) Insects temperature is measured by thermo electric thermometer c) Temperature of Human body is measured by mercury thermometer.
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a
a & b are true
b
b & c are true
c
c & a are true
d
a,b,c are true.
answer is D.
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Detailed Solution
Pyrometer measures temperature of sun by measuring the radiation. Temperature of insect changes by very small amount. Thermo electric thermometer can measure a very small change in temperature.