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Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceAssertion–reasonEasyConceptual

JEE Main 2 April 2025, Shift 2, Physics Q41

Question 41 of 75 in this shift, Physics question 16 of 25, Section A.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Net dipole moment of a polar linear isotropic dielectric substance is not zero even in the absence of an external electric field. Reason (R) : In absence of an external electric field, the different permanent dipoles of a polar dielectric substance are oriented in random directions. In the light of the above statements, choose the most appropriate answer from the options given below :
  1. (1)Both (A) and (R) are correct and (R) is the correct explanation of (A)
  2. (2)Both (A) and (R) are correct but (R) is not the correct explanation of (A)
  3. (3)(A) is correct but (R) is not correct
  4. (4)(A) is not correct but (R) is correctOfficial answer

Official answer

Option 4

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
Dielectrics
Idea tested
Polar vs. Non-Polar Dielectrics

Same topic in other shifts

All Dielectrics questions
  1. 2 Apr 2026, Shift 1 · Q32A parallel plate air capacitor has a capacitance C. When it is half filled as show in figure with a dielectric constant K=5K=5, the…EasySingle correctHas a figure
  2. 8 Apr 2026, Shift 2 · Q46A parallel plate capacitor is having separation between plates 0.885 mm. It has a capacitance of 1 μ\muF when the space between the…HardNumerical value
  3. 3 Apr 2025, Shift 1 · Q38A parallel plate capacitor is filled equally(half) with two dielectrics of dielectric constants ϵ1\epsilon_1 and ϵ2\epsilon_2, as shown in…MediumDiagram basedHas a figure
  4. 4 Apr 2025, Shift 2 · Q35Three parallel plate capacitors C1C_1, C2C_2 and C3C_3 each of capacitance 5 μ\muF are connected as shown in figure. The effective…EasySingle correctHas a figure
  5. 7 Apr 2025, Shift 2 · Q49A parallel plate capacitor has charge 5×10−65\times10^{-6} C. A dielectric slab is inserted between the plates and almost fills the space…MediumNumerical value
  6. 8 Apr 2025, Shift 2 · Q49Space between the plates of a parallel plate capacitor of plate area 4 cm2^2 and separation of (d) 1.77 mm, is filled with uniform…MediumNumerical valueHas a figure

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.