1
JEE Main 2020 (Online) 3rd September Morning Slot
Numerical
+4
-0
If $${\left( {{{1 + i} \over {1 - i}}} \right)^{{m \over 2}}} = {\left( {{{1 + i} \over {1 - i}}} \right)^{{n \over 3}}} = 1$$, (m, n
$$ \in $$ N) then the
greatest common divisor of the least values of
m and n is _______ .
Your input ____
2
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Using screw gauge of pitch 0.1 cm and
50 divisions on its circular scale, the thickness
of an object is measured. It should correctly be
recorded as
3
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Model a torch battery of length $$l$$ to be made up
of a thin cylindrical bar of radius ‘a’ and a
concentric thin cylindrical shell of radius ‘b’
filled in between with an electrolyte of
resistivity $$\rho $$ (see figure). If the battery is
connected to a resistance of value R, the
maximum Joule heating in R will take place for :
![JEE Main 2020 (Online) 3rd September Morning Slot Physics - Current Electricity Question 206 English](https://imagex.cdn.examgoal.net/jgy2xukf145qx7/03eee02c-0615-4af7-b50b-77d38a910a1b/200265b0-f5c2-11ea-8293-3b6cc591631c/file-jgy2xukf145qx8-269w.png)
![JEE Main 2020 (Online) 3rd September Morning Slot Physics - Current Electricity Question 206 English](https://imagex.cdn.examgoal.net/jgy2xukf145qx7/03eee02c-0615-4af7-b50b-77d38a910a1b/200265b0-f5c2-11ea-8293-3b6cc591631c/file-jgy2xukf145qx8-269w.png)
4
JEE Main 2020 (Online) 3rd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
When the wavelength of radiation falling on a metal is changed from 500 nm to 200 nm, the
maximum kinetic energy of the photoelectrons becomes three times larger. The work function of
the metal is close to :
Paper analysis
Total Questions
Chemistry
18
Mathematics
23
Physics
24
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