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Q.

Pick up the correct statement
a) Sun's temperature is measured by a pyrometer
b) Insect's 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

a, b, c are true.

c

c & a are true

d

b & c are true

answer is D.

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Detailed Solution

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Pyrometer measures temperature of sun by measuring the radiation. Temperature of insect changes by very small amount. Thermo-electric thermometer can measure very small change in temperature.

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