1
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
Change Language

In Young's double slit experiment the two slits are 0.6 mm distance apart. Interference pattern is observed on a screen at a distance 80 cm from the slits. The first dark fringe is observed on the screen directly opposite to one of the slits. The wavelength of light will be ____________ nm.

Your input ____
2
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
Change Language

A beam of monochromatic light is used to excite the electron in Li+ + from the first orbit to the third orbit. The wavelength of monochromatic light is found to be x $$\times$$ 10$$-$$10 m. The value of x is ___________.

[Given hc = 1242 eV nm]

Your input ____
3
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
Change Language

The current density in a cylindrical wire of radius 4 mm is 4 $$\times$$ 106 Am$$-$$2. The current through the outer portion of the wire between radial distances $${R \over 2}$$ and R is ____________ $$\pi$$ A.

Your input ____
4
JEE Main 2022 (Online) 27th June Morning Shift
Numerical
+4
-1
Change Language

A capacitor of capacitance 50 pF is charged by 100 V source. It is then connected to another uncharged identical capacitor. Electrostatic energy loss in the process is ___________ nJ.

Your input ____
JEE Main Papers
2023
2021
EXAM MAP