NEET Physics: 10 Essential Questions (PART 5) 📚

NEET Physics Quiz

1. What is the SI unit of electric flux?

A. Volt-meter
B. Joule-meter
C. Newton/Coulomb
D. Volt/meter

Correct answer: A. Electric flux (φE) = E × A, unit = (V/m) × m² = V·m.

2. A geostationary satellite orbits at a fixed height above the Earth's surface. What is its orbital period?

A. 12 hours
B. 24 hours
C. 36 hours
D. 72 hours

Correct answer: B. Geostationary satellites match Earth's rotation, 24 hours.

3. The photoelectric effect is the emission of electrons from a metal when it is exposed to:

A. Heat
B. Light
C. Electric field
D. Magnetic field

Correct answer: B. Light photons transfer energy to electrons, ejecting them.

4. A car starts from rest and accelerates at a constant rate of 2 m/s². What will be its velocity after 10 seconds?

A. 10 m/s
B. 20 m/s
C. 30 m/s
D. 40 m/s

Correct answer: B. v = u + at = 0 + (2 × 10) = 20 m/s.

5. The force between two parallel current-carrying wires is:

A. Attractive if currents are in same direction
B. Repulsive if currents are in same direction
C. Always attractive
D. Always repulsive

Correct answer: A. Same direction currents → attractive force; opposite → repulsive.

6. If the radius of a nucleus is doubled, its volume will be:

A. Doubled
B. Halved
C. Quadrupled
D. Eight times

Correct answer: D. Volume ∝ r³; doubling r → 8× volume.

7. Which of the following is NOT a property of electromagnetic waves?

A. They are transverse waves.
B. They travel at speed of light in vacuum.
C. They require a medium to propagate.
D. They have oscillating E & M fields.

Correct answer: C. EM waves propagate even in vacuum.

8. The magnifying power of a telescope is given by:

A. fₒ × fₑ
B. fₒ / fₑ
C. fₑ / fₒ
D. fₒ + fₑ

Correct answer: B. MP = focal length of objective ÷ focal length of eyepiece.

9. What is the main function of a rectifier?

A. Increase AC voltage
B. Decrease AC voltage
C. Convert AC to DC
D. Convert DC to AC

Correct answer: C. Rectifiers allow current in one direction, making DC.

10. A body is thrown with a velocity of 20 m/s at an angle of 30° to the horizontal. What is its horizontal range? (g = 10 m/s², sin 60° = √3/2)

A. 20√3 m
B. 40√3 m
C. 30√3 m
D. 50√3 m

Correct answer: A. R = (u² sin 2θ)/g = (400 × √3/2)/10 = 20√3 m.

NEET Physics: 10 Essential Questions (PART 4) 📚

NEET Physics Quiz

1. Which of the following is a unit of magnetic field strength?

A. Weber
B. Henry
C. Tesla
D. Farad

Correct answer: C. The Tesla is the SI unit of magnetic field strength (or magnetic flux density). The Weber is the unit of magnetic flux, the Henry is the unit of inductance, and the Farad is the unit of capacitance.

2. According to the principle of conservation of momentum, if two bodies collide in a closed system, what is conserved?

A. Kinetic energy
B. Total energy
C. Momentum
D. All of the above

Correct answer: C. The law of conservation of momentum states that the total momentum of a closed system remains constant, as long as no external forces act on it.

3. The phenomenon of total internal reflection occurs when light travels from:

A. A denser medium to a rarer medium
B. A rarer medium to a denser medium
C. Any medium to another medium
D. None of the above

Correct answer: A. Total internal reflection occurs when light travels from a medium with a higher refractive index (denser) to one with a lower refractive index (rarer) and the angle of incidence exceeds the critical angle.

4. A car travels at a speed of 60 km/h for the first half of a journey and 120 km/h for the second half. What is the average speed of the car for the entire journey?

A. 80 km/h
B. 90 km/h
C. 100 km/h
D. 120 km/h

Correct answer: A. Using average speed formula, result is 80 km/h.

5. The color of a star is an indicator of its:

A. Distance from Earth
B. Mass
C. Temperature
D. Age

Correct answer: C. A star's color is directly related to its surface temperature.

6. In a series LCR circuit, at resonance, the phase difference between the voltage and current is:

A. 90°
B. 180°
C. 0°
D. 45°

Correct answer: C. At resonance, inductive and capacitive reactances cancel, making voltage and current in phase.

7. A sound wave with a frequency of 20,000 Hz is considered:

A. Infrasonic
B. Ultrasonic
C. Audible
D. Subsonic

Correct answer: B. Sounds above 20 kHz are ultrasonic.

8. What happens to the kinetic energy of a falling body?

A. It increases
B. It decreases
C. It remains constant
D. It becomes zero

Correct answer: A. Potential energy converts to kinetic energy during fall, increasing it.

9. The phenomenon responsible for the twinkling of stars is:

A. Scattering of light
B. Reflection of light
C. Atmospheric refraction of light
D. Dispersion of light

Correct answer: C. Atmospheric refraction causes star twinkling.

10. A nucleus of an atom has a size of the order of:

A. 10^-10 m
B. 10^-15 m
C. 10^-12 m
D. 10^-8 m

Correct answer: B. Nucleus size is around 10^-15 meters.

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.

NEET Physics: 10 Essential Questions (PART 2) 📚

NEET Physics Quiz — Set 2 (10 Qs)

1. A wire of resistance R is cut into 10 equal parts. These parts are then connected in parallel. The new resistance of the combination will be:

A. R B. R/10 C. R/100 D. 100R

2. A block slides down a smooth inclined plane of inclination θ. The acceleration of the block will be:

A. g B. g sinθ C. g cosθ D. g tanθ

3. The kinetic energy of a body of mass m is E. Its momentum is:

A. √(2mE) B. 2mE C. mE D. √(mE/2)

4. Which of the following has the highest thermal conductivity?

A. Copper B. Lead C. Glass D. Water

5. The energy of a photon is given by:

A. hν B. h/ν C. c/ν D. E/ν

6. In a simple harmonic motion, the total energy of the oscillating body is directly proportional to the square of its:

A. Velocity B. Displacement C. Time period D. Amplitude

7. A car accelerates uniformly from rest to 108 km/h in 5 seconds. The acceleration of the car is:

A. 21.6 m/s² B. 6 m/s² C. 3 m/s² D. 10 m/s²

8. The instrument used to measure the electric current in a circuit is called:

A. Voltmeter B. Ammeter C. Galvanometer D. Ohmmeter

9. A spring is stretched by a force. The energy stored in the spring is given by:

A. 1/2 F x B. 1/2 k x C. 1/2 k x² D. 1/2 F x²

10. The phenomenon of light responsible for the blue color of the sky is:

A. Reflection B. Refraction C. Dispersion D. Scattering

NEET Physics: 10 Essential Questions (PART 1) 📚

NEET Physics Quiz

1. A block of mass m is pulled along a horizontal frictionless surface by a rope of mass m/2. If a force F is applied at the end of the rope, the force with which the rope pulls the block is:

A. F
B. F/2
C. F/3
D. 2F/3

2. A body is projected vertically upwards. At its maximum height, its velocity is:

A. Maximum
B. Half of its initial velocity
C. Zero
D. Equal to its initial velocity

3. The work done by a centripetal force on a body moving in a circular path is:

A. Positive
B. Negative
C. Zero
D. Depends on the velocity

4. A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. The focal length of the combination is:

A. 60 cm
B. 40 cm
C. 20 cm
D. 80 cm

5. If a wire is stretched to double its length, its resistance becomes:

A. Two times
B. Half
C. Four times
D. One-fourth

6. Which of the following is not a unit of energy?

A. Joule
B. Electron volt
C. Kilowatt
D. Calorie

7. A stone is thrown horizontally from the top of a tower. During its motion, which of the following remains constant?

A. Vertical velocity
B. Horizontal velocity
C. Both A and B
D. None of the above

8. The escape velocity of a body from the surface of the Earth is approximately:

A. 9.8 m/s
B. 11.2 km/s
C. 11.2 m/s
D. 1.6 km/s

9. According to Ohm's law, the relationship between voltage (V), current (I), and resistance (R) is:

A. V = I/R
B. R = I/V
C. V = IR
D. I = VR

10. A plane mirror produces an image that is:

A. Real and inverted
B. Virtual and inverted
C. Real and erect
D. Virtual and erect