NEET Physics important Questions– Set 3 (Questions 21–30)
This is Set 3 of our NEET 2025 Physics PYQ-style series. Each question follows the actual NEET pattern with bilingual explanations (English + Hinglish). For previous sets: Set 1 | Set 2
Q21. A satellite in low Earth orbit has orbital speed given by:
Hinglish: LEO satellite ki speed kis formula se aati hai?
(a) $v = \sqrt{\frac{GM}{R+h}}$
(b) $v = \sqrt{gR}$
(c) $v = \frac{GM}{R^2}$
(d) $v = \sqrt{GR}$
Correct: (a)
$ v = \sqrt{\frac{GM}{R+h}} $ is the orbital speed formula.
Hinglish: Satellite ka circular orbit isi formula se nikalta hai.
$ v = \sqrt{\frac{GM}{R+h}} $ is the orbital speed formula.
Hinglish: Satellite ka circular orbit isi formula se nikalta hai.
Q22. For an adiabatic process, which relation is correct?
Hinglish: Adiabatic process mein kaunsa equation sahi hota hai?
(a) $PV = constant$
(b) $PT = constant$
(c) $PV^\gamma = constant$
(d) $P^2V = constant$
Correct: (c)
Adiabatic curve follows: $ PV^{\gamma} = constant $.
Adiabatic curve follows: $ PV^{\gamma} = constant $.
Q23. Two parallel current-carrying wires attract if:
Hinglish: Do tar parallel current ke saath kab attract karte hain?
(a) Currents opposite
(b) Currents same direction
(c) One AC, one DC
(d) Only if distance is large
Correct: (b)
Same direction currents → attractive force.
Same direction currents → attractive force.
Q24. Resistivity of a metal:
Hinglish: Metal ki resistivity temperature se kaise badalti hai?
(a) Decreases with temperature
(b) Increases with temperature
(c) Independent of temperature
(d) Zero always
Correct: (b)
Metal resistivity increases due to increased lattice vibration.
Metal resistivity increases due to increased lattice vibration.
Q25. A concave mirror forms real inverted image when object is placed:
(a) Between pole and focus
(b) Beyond focus
(c) At focus
(d) Nowhere
Correct: (b)
Real & inverted image forms when object lies beyond F.
Real & inverted image forms when object lies beyond F.
Q26. Wien’s displacement law is:
(a) $E = mc^2$
(b) $\lambda_m T = constant$
(c) $PV = nRT$
(d) $P \propto T^4$
Correct: (b)
Q27. X-ray wavelength decreases when:
(a) Anode material is light
(b) Accelerating voltage increases
(c) Current decreases
(d) Temperature increases
Correct: (b)
Higher voltage → higher electron energy → shorter wavelength.
Higher voltage → higher electron energy → shorter wavelength.
Q28. Sound intensity is proportional to:
(a) Amplitude
(b) Frequency
(c) Amplitude²
(d) Velocity
Correct: (c)
Q29. Torque on electric dipole is:
(a) $pE$
(b) $p/E$
(c) $pE\sin\theta$
(d) Zero always
Correct: (c)
Q30. Bohr radius for hydrogen atom varies as:
(a) $n$
(b) $n^2$
(c) $1/n$
(d) $1/n^2$
Correct: (b)
Next Set Coming: Set-4 (Questions 31–40) → Semiconductors, Modern Physics, SHM
👉 Go to Next Set
Comments