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JEE Main 2021 (Online) 20th July Evening Shift
Numerical  +4  -1
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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JEE Main 2021 (Online) 20th July Morning Shift
Numerical  +4  -1
The Azimuthal quantum number for the valence electrons of Ga+ ion is ___________.

(Atomic number of Ga = 31)
In the ground state of atomic Fe(Z = 26), the spin-only magnetic moment is ____________ $$\times$$ 10$$-$$1 BM. (Round off to the Nearest Integer). [Given : $$\sqrt 3$$ = 1.73, $$\sqrt 2$$ = 1.41 ]
A certain orbital has n = 4 and mL = $$-$$3. The number of radial nodes in this orbital is ____________. (Round off to the Nearest Integer).