Q.

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.
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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.