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NEET Physics important Questions– Set 4 (Questions 31–40)

 

NEET Physics important Questions– Set 4 (Questions 31–40)

Set 4 covers Modern Physics, SHM, Electromagnetism, Thermodynamics, Waves and more. This series follows the NEET pattern with bilingual reasoning (English + Hinglish).

Previous Sets: Set 1 | Set 2 | Set 3

Q31. In SHM, total energy is proportional to:

Hinglish: SHM mein total energy kis cheez ke proportional hoti hai?

(a) Amplitude
(b) $A^2$
(c) $1/A$
(d) $1/A^2$
Correct: (b) Total energy in SHM is $E = \frac{1}{2} k A^2$.

Q32. Photoelectric effect stops when:

Hinglish: Photoelectric effect kab rukta hai?

(a) Intensity zero
(b) Frequency less than threshold
(c) Voltage negative
(d) Electrons collide
Correct: (b) If $f < f_{0}$ → no electrons ejected.

Q33. Magnetic flux through a surface depends on:

(a) Angle only
(b) Area only
(c) Field only
(d) $BA\cos\theta$
Correct: (d) $\Phi = BA\cos\theta$

Q34. A Carnot engine depends on:

(a) Working substance
(b) Sink temperature only
(c) Source & sink temperature
(d) Shape of piston
Correct: (c) $\eta = 1 - \frac{T_L}{T_H}$

Q35. Which radiation has highest penetrating power?

(a) Alpha
(b) Beta
(c) Gamma
(d) Neutron
Correct: (c) Gamma rays have maximum penetrating ability.

Q36. Wave velocity depends on:

Hinglish: Tarang ki speed medium par depend karti hai ya frequency par?

(a) Frequency only
(b) Wavelength only
(c) Medium only
(d) Both
Correct: (c) Wave speed is fixed by medium properties.

Q37. The SI unit of electric flux is:

(a) Weber
(b) Volt
(c) $Nm^2/C$
(d) Farad
Correct: (c)

Q38. Nuclear fission releases energy because:

(a) Mass increases
(b) Binding energy decreases
(c) Binding energy per nucleon increases
(d) Temperature rises
Correct: (c) Products have higher binding energy per nucleon.

Q39. Electric field inside a hollow conductor:

(a) Maximum
(b) Zero
(c) Depends on voltage
(d) Infinite
Correct: (b)

Q40. A proton and electron enter same magnetic field. Their path radii:

(a) Same
(b) $r_p > r_e$
(c) $r_p < r_e$
(d) Depends on charge
Correct: (b) $r = \frac{mv}{qB}$ → proton has larger mass → larger radius.

Next Set Coming: Set-5 (Questions 41–50) — final set of this NEET 2025 Physics series!

👉 Go to Next Set
NEET — Chemistry →
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