Question

The temperature of a body mearlsured by a thermometer is 25°C+0.5°C. What is the percentage error in the measurement?
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Answer 1

Answer:

Here, t

1

=20

o

C±0.5

o

C

t

2

=50

o

C±0.5

o

C

The temperature difference between the two bodies is

t=t

2

−t

1

,

=50

o

C−20

o

C=30

o

C

The error in temperature difference is given by

Δt=(Δt

1

+Δt

2

)=(0.5

o

C+0.5

o

C)=1

o

C

∴ The temperature difference is 30

o

C±1

o

C.