Day 431: JEE Mains Physics

5 questions. Try each one first, then open its answer.

Question 1

Units and Measurements. Asked once: 2021 Paper 21 (same type asked 20 times) See all 20 of this type

R_{H}

List-I	List-II
(A) $R_{H}$ (Rydberg constant)	(i) $kg\,m^{-1}\,s^{-1}$
(B) $h$ (Planck's constant)	(ii) $kg\,m^{2}\,s^{-1}$
(C) $\mu_{B}$ (Magnetic field energy density)	(iii) $m^{-1}$
(D) $\eta$ (coefficient of viscosity)	(iv) $kg\,m^{-1}\,s^{-2}$

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Units and Measurements. Asked once: 2021 Paper 3 (same type asked 20 times) See all 20 of this type

h

List-I	List-II
(A) $h$ (Planck's constant)	(i) $\left\lbrack MLT^{-1} \right\rbrack$
(B) $E$ (kinetic energy)	(ii) $\left\lbrack ML^{2}T^{-1} \right\rbrack$
(C) $V$ (electric potential)	(iii) $\left\lbrack ML^{2}T^{-2} \right\rbrack$
(D) $P$ (linear momentum)	(iv) $\left\lbrack ML^{2}I^{-1}T^{-3} \right\rbrack$

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Question 3
Alternating Current. Asked once: 28 Jan 2026 S2
23 $\_\_\_\_$
Question 4
Atoms. Asked once: 4 Apr 2026 S2
18 $In Rutherford's alpha-particle scattering experiment, only a few alpha particles rebound back because (A)The size of gold nucleus is very small as compared to the size of gold atom. (B) Alpha particle and gold nucleus have equal charge. (C) The impact parameter is minimum for a few alpha particles. (D) A few alpha particles have very high kinetic energy. (E) Only a few alpha particles undergo head-on collision with the nuclei. Choose the correct answer from the options given below :$
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Question 5
Current Electricity. Asked once: 8 Apr 2026 S2
24 $\_\_\_\_$