Free physics question bank
JEE Mains 2025 23 Jan Evening Shift physics questions with solutions
Browse JEE Mains 2025 23 Jan Evening Shift Physics questions with solutions. Useful for JEE, NEET, and school exam revision.
Showing 1–10 of 20 questions
- MCQeasyGeometrical optics
A concave mirror of focal length f is completely immersed in a fluid of re index μ. Its new focal length is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQmediumCurrent electricity
A moving-coil galvanometer has resistance 30 Ω and gives full-scale deflection at 20 mA. It is converted into a 3 A ammeter using a shunt resistance S. The approximate value of S is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - IntegermediumUnit dimension and error
The energy of a system varies as E(x,t)=x³ where β=0.3 s⁻¹. Percentage error in x is 1.2% and percentage error in t is 1.6%. Find the maximum percentage error in E at t=5 s.
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQeasysemiconductor
Two identical parallel branches are connected across a 5 V ideal battery. Each branch contains an ideal diode in forward direction and a 20 Ω resistor in series. Find the current through the battery.
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQeasyElectrostatic
Two charges +7 C and -4 C are located at (-7,0,0) and (7,0,0). Taking k=9×10⁹ SI units, the electrostatic potential energy of the system is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQmediumThermodynamics
In the P–V diagram, a gas goes A(2V₀,P₀) → B(3V₀,P₀) → C(3V₀,2P₀) → D(2V₀,2P₀) → E(V₀,2P₀). Find the total work done by the gas from A to E.
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQeasyPhotoelectric effect and dual nature of matter
In a photoelectric experiment, the stopping potential is 2 V and the work function is 2.14 eV. Given hc=1242 eV·nm, the wavelength of incident light is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQmediumGravitation
A satellite is nine times closer to Earth than the Moon. If the Moon's orbital period is 27 days, the satellite's orbital period is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - MCQmediumThermodynamics
The temperature of a body of mass m and specific heat capacity s is raised slowly from T₁ to T₂. The entropy change of the body is:
Options
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution → - IntegermediumCapacitor
An 8 μF capacitor is connected across the 10 Ω resistor in a series circuit containing 10 Ω and 15 Ω resistors with a 5 V DC source. Find the steady-state charge on the capacitor. (The source paper prints the charge unit as μF.)
JEE Mains 2025 23 Jan Evening Shift
Open question & full solution →