1
IIT-JEE 2004
Subjective
+2
-0
A screw gauge having 100 equal divisions and a pitch of length 1 mm is used to measure the diameter of a wire of length 5.6 cm. The main scale reading is 1mm and 47th circular division coincides with the main scale. Find the curved surface area of wire in cm2 to appropriate significant figures. ( use $$\pi = {{22} \over 7}$$ )
2
IIT-JEE 2004
Subjective
+2
-0
In Searle's experiment, which is used to find Young's Modulus of elasticity, the diameter of experimental wire is D = 0.05 cm ( measured by a scale of least count 0.001 cm ) and length is L = 110 cm ( measured by a scale of least count 0.1 cm ). A weight of 50 N causes an extension of X = 0.125 cm (measured by a micrometer of least count 0.001 cm ). Find maximum possible error in the value of Young's modulus. Screw gauge and and meter scale are free from error.
3
IIT-JEE 2003
Subjective
+2
-0
If nth divisions of the main scale coincide with (n+1)th divisions of vernier scale. Given one main scale division is equal to 'a' units. Find the least count of the vernier.
4
IIT-JEE 1990
Subjective
+3
-0

Column - I gives the three physical quantities. Select the appropriate units for the choices given in Column - II. Some of the physical quantities may have more than one choice correct:

Column I Column II
Capacitance (i) ohm-second
Inductance (ii) coulomb2 - joule-1
Magnetic Induction (iii) coulomb (volt)-1
(iv) newton (amp-meter)-1
(v) volt-second (ampere)-1
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