NEET Physics: 10 Essential Questions (PART 3) 📚

NEET Physics Quiz

1. A force of 10 N is applied to a body of mass 2 kg. What is the acceleration produced?

A. 5 m/s²
B. 10 m/s²
C. 20 m/s²
D. 2 m/s²

Correct answer: A. Using F=ma → a=F/m=10/2=5 m/s².

2. The instrument used to measure atmospheric pressure is:

A. Hygrometer
B. Barometer
C. Ammeter
D. Voltmeter

Correct answer: B. A barometer measures atmospheric pressure.

3. The escape velocity from the surface of a planet is independent of the:

A. Mass of the planet
B. Radius of the planet
C. Mass of the object
D. Gravitational constant G

Correct answer: C. Formula v = √(2GM/R) shows no dependence on object mass.

4. A convex mirror is used as a rear-view mirror in vehicles because it:

A. Gives a wide field of view
B. Forms a real image
C. Forms an inverted image
D. Is made of special glass

Correct answer: A. Convex mirrors give a wide field of view.

5. What is the main function of a transformer?

A. Convert AC to DC
B. Convert DC to AC
C. Change voltage of AC supply
D. Convert mechanical to electrical energy

Correct answer: C. Transformers step up or step down AC voltage.

6. If the speed of a wave doubles while frequency remains constant, its wavelength will:

A. Double
B. Halve
C. Remain the same
D. Quadruple

Correct answer: A. v = fλ; if v doubles, λ doubles when f is constant.

7. A planet revolving around the sun in an elliptical orbit conserves:

A. Kinetic energy
B. Potential energy
C. Linear momentum
D. Angular momentum

Correct answer: D. Kepler's second law implies conservation of angular momentum.

8. The unit of power of a lens is:

A. Meter
B. Candela
C. Dioptre
D. Watt

Correct answer: C. Power of lens (in dioptres) = 1/f (m).

9. The energy stored in a capacitor is given by:

A. 1/2 QV
B. 1/2 CV
C. 1/2 Q²V
D. 1/2 C/V

Correct answer: A. U = 1/2 QV = 1/2 CV² = Q²/(2C).

10. A body is in free fall. The value of gravitational acceleration is:

A. 9.8 m/s²
B. Dependent on its mass
C. 6.67 × 10⁻¹¹ Nm²/kg²
D. Always increasing

Correct answer: A. g ≈ 9.8 m/s² near Earth's surface.