1
JEE Main 2014 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
A student measured the length of a rod and wrote it as 3.50 cm. Which instrument did he use to measure it?
A
A screw gauge having 100 divisions in the circular scale and pitch as 1 mm.
B
A screw gauge having 50 divisions in the circular scale and pitch as 1 mm.
C
A meter scale.
D
A vernier calliper where the 10 divisions in vernier scale matches with 9 division in main scale and main scale has 10 divisions in 1 cm.
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Change Language
Let [$${\varepsilon _0}$$] denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then:
A
$${\varepsilon _0} = \left[ {{M^{ - 1}}{L^{ - 3}}{T^2}A} \right]$$
B
$${\varepsilon _0} = $$$$\left[ {{M^{ - 1}}{L^{ - 3}}{T^4}{A^2}} \right]$$
C
$${\varepsilon _0} = \left[ {{M^1}{L^2}{T^1}{A^2}} \right]$$
D
$${\varepsilon _0} = \left[ {{M^1}{L^2}{T^1}A} \right]$$
3
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Change Language
Resistance of a given wire is obtained by measuring the current flowing in it and the voltage difference applied across it. If the percentage errors in the measurement of the current and the voltage difference are 3% each, then error in the value of resistance of the wire is
A
6 %
B
zero
C
1 %
D
3 %
4
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
Change Language
A spectrometer gives the following reading when used to measure the angle of a prism.
Main scale reading: 58.5 degree
Vernier scale reading : 09 divisions
Given that 1 division on main scale corresponds to 0.5 degree. Total divisions on the vernier scale is 30 and match with 29 divisions of the main scale. The angle of the prism from the above data
A
58.59 degree
B
58.77 degree
C
58.65 degree
D
59 degree
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