1
JEE Main 2021 (Online) 20th July Evening Shift
Numerical
+4
-1
Change Language
The wavelength of electrons accelerated from rest through a potential difference of 40 kV is x $$\times$$ 10$$-$$12 m. The value of x is ___________. (Nearest integer)

Give : Mass of electron = 9.1 $$\times$$ 10$$-$$31 kg

Charge on an electron = 1.6 $$\times$$ 10$$-$$19 C

Planck's constant = 6.63 $$\times$$ 10$$-$$34 Js
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2
JEE Main 2021 (Online) 20th July Morning Shift
Numerical
+4
-1
Change Language
The Azimuthal quantum number for the valence electrons of Ga+ ion is ___________.

(Atomic number of Ga = 31)
Your input ____
3
JEE Main 2021 (Online) 17th March Morning Shift
Numerical
+4
-1
Change Language
A certain orbital has n = 4 and mL = $$-$$3. The number of radial nodes in this orbital is ____________. (Round off to the Nearest Integer).
Your input ____
4
JEE Main 2021 (Online) 16th March Evening Shift
Numerical
+4
-1
Change Language
The number of orbitals with n = 5, m1 = +2 is ___________. (Round off to the Nearest Integer).
Your input ____
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