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 47^{th} circular division coincides
with the main scale. Find the curved surface area of wire in cm^{2} 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 n^{th} 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) coulomb^{2} - joule^{-1} |
Magnetic Induction | (iii) coulomb (volt)^{-1} |
(iv) newton (amp-meter)^{-1} | |
(v) volt-second (ampere)^{-1} | |
Questions Asked from Units & Measurements (Subjective)
Number in Brackets after Paper Indicates No. of Questions
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