JEE Mains 2025 22 Jan Evening Shift physics questions with solutions

Showing 1–10 of 20 questions

• MCQmediumElectrostaticElectric Dipole & Dipole Moment

  For an electric dipole, the electric field and potential at an axial point a distance r from its centre are E₀ and V₀. What are the electric field magnitude and potential at an equatorial point a distance 2r from the centre?

  Options

  • Option A

    E₀/16, 0

  • Option B

    E₀/4, 0

  • Option C

    E₀, V₀

  • Option D

    E₀/8, 0

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• MCQmediumWave OpticsHuygens' Principle & Interference of Light

  A glass slab of re$fractive$ index $\mu_{g}$=1.44 is coated with a thin film of re$fractive$ index $\mu_{f}$=2. Find the minimum film thickness for maximum transmission of normally incident green light of wavelength 5000 Å.

  Options

  • Option A

    0.500 μm

  • Option B

    0.250 μm

  • Option C

    0.125 μm

  • Option D

    1.00 μm

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• MCQeasyCapacitorRC Circuits: Charging & Discharging

  In the resistor-capacitor network shown in the original question figure, find the steady-state current I supplied by source V. Every resistor has resistance R.

  

  Options

  • Option A

    V/(5R)

  • Option B

    5V/(3R)

  • Option C

    8V/(13R)

  • Option D

    3V/R

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• MCQmediumRotational MotionTorque & Rotational Equilibrium

  A force $\vec{F}$=(î+2ĵ-3k̂) N acts at a point whose position vector is $\vec{r}$=(2î-3ĵ+7k̂) m. Find the torque about the origin.

  Options

  • Option A

    (+5î-12ĵ+7k̂) N·m

  • Option B

    (-5î-12ĵ+8k̂) N·m

  • Option C

    (-5î+13ĵ+7k̂) N·m

  • Option D

    (-5î+13ĵ-7k̂) N·m

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• MCQmediumUnits, Dimensions, Measurements and ErrorsDimensional Analysis and Its Applications

  The dimensional formula of capacitance is:

  Options

  • Option A

    [M⁻¹L²T²A⁻³]

  • Option B

    [M⁻¹L⁻²T⁴A³]

  • Option C

    [M⁻¹L⁻²T⁴A²]

  • Option D

    [M⁻¹L⁻²T²A²]

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• MCQmediumsemiconductorLogic Gates & Boolean Operations

  In the diode logic circuit shown in the original question figure, identify the logic gate represented at output Y.

  

  Options

  • Option A

    OR

  • Option B

    AND

  • Option C

    NOT

  • Option D

    NAND

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• MCQmediumElectromagnetic waveDisplacement Current, Maxwell's Equations and Properties of Electromagnetic Waves

  The displacement current through a capacitor of plate area 16 cm² is 6 A at an instant. Assuming uniform electric field, find the displacement current corresponding to area 3.2 cm

  

  Options

  • Option A

    1.2 A

  • Option B

    1.6 A

  • Option C

    2.1 A

  • Option D

    0.5 A

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• MCQmediumAC CircuitsSeries AC Circuits: Impedance, Phase Difference, Resonance and Power Factor

  In a series LCR circuit, the maximum current amplitude at resonance is I₀ when the resistance is R. What is the maximum current amplitude if the resistance is replaced by R/2?

  Options

  • Option A

    I₀

  • Option B

    2I₀

  • Option C

    I₀/2

  • Option D

    2I₀/3

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• IntegereasyCurrent electricityEquivalent Resistance & Networks

  In the symmetric resistor network shown in the original question figure, every resistor has resistance R. If the equivalent resistance across A and B is NR/2, find N.

  

  Your answer

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• MCQmediumWork , Power and EnergyWork Done by Forces

  A force $\vec{F}$=(2î+bĵ+k̂) N acts through a displacement $\vec{d}$=(î+ĵ+k̂) m. Find b if the work done by the force is zero.

  Options

  • Option A

    0

  • Option B

    +3

  • Option C

    -3

  • Option D

    -1

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