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qUESTIONS

A screw gauge gives the following reading when used to measure the diameter of a wire. Main scale reading: 0 mm, Circular scale reading: 52 divisions. Given that 1 mm on main scale corresponds to 100 divisions of the circular scale. The diameter of wire from the above data is [2011]

The resistance R= V/ i where V = 100 ± 5 volts and i = 10 ± 0.2 amperes. What is the total error in R [2012]

Dimensions of 1/ μ0ε0 where symbols have their usual meaning are [2003]

The physical quantities not having same dimensions are [2003]

Which of the two have same dimensions? [2002]

Out of the following pairs, which one does not have identical dimensions [2005]

The dimension of magnetic field in M, L, T and C (coulomb) is given as [2008]

The density of a material in the shape of a cube is determined by measuring three sides of the cube and its mass. If the relative errors in measuring the mass and length are respectively 1.5% and 1% the maximum error in determining the density is [2018]

The period of oscillation of a simple pendulum is T = 2π√ (L/g) Measured value of L is 20.0 cm known to 1 mm accuracy and time for 100 oscillations of the pendulum is found to be 90 s using a wrist watch of 1 s resolution. The accuracy in the determination of g is [2015]

There are two Vernier calipers both of which have 1 cm divided into 10 equal divisions on the main scale. The Vernier scale of one of the calipers (C1) has 10 equal divisions that correspond to 9 main scale divisions. The Vernier scale of the other calipers (C2) has 10 equal divisions that correspond to 11 main scale divisions. The readings of the two calipers are shown in the figure. The measure values (in cm) by calliper C1 and C2 are: [2016]

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