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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale. While measuring the diameter of a wire, the linear scale reads 1 mm and 47th division on the circular scale coincides with the reference line. The length of the wire is 5.6 cm. Find the curved surface area (in cm ^2) of the wire in appropriate number of significant figures.

The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale. While measuring the diameter of a wire, the linear scale reads 1 mm and 47th division on the circular scale coincides with the reference line. The length of the wire is 5.6 cm. Find the curved surface area (in cm ^2) of the wire in appropriate number of significant figures.

The energy of a system as a function of time t is given as E(t)=A^2 exp(−αt) the percentage error in the value of E(t) at t = 5 s` is The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale. While measuring the diameter of a wire α=0.2 s−1. The measurement of A has an error of 1.25%. If the error In the measurement of time is 1.50%