Science MCQ Questions with answers

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Here Important Science MCQ questions are added which are frequently asked in almost all the examinations. You can check the correct answer of any question on clicking the show answer button. The Correct answer will be displayed below. You can share any question with your friends on whatsapp by tapping Share button.

Learn Science mcqs in hindi here.

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. A convex lens and concave lens each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power (in dioptres) of the combination is :

(A) 25
(B) Zero
(C) Infinite
(D) 50

💬 Discuss

✅ Correct Answer: (B) Zero

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. The magnetic moment has dimension of :

(A) [L²A]
(B) [LA]
(C) [L²T-1A]
(D) [LT-1A]

💬 Discuss

✅ Correct Answer: (A) [L²A]

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. Which of the following shows that the Earth behaves as a magnet ?

(A) Repulsion between like poles
(B) Null points in the magnetic field of a bar magnet
(C) Attraction between unlike poles
(D) No existence of isolated magnetic poles

💬 Discuss

✅ Correct Answer: (B) Null points in the magnetic field of a bar magnet

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. In the Davisson – Germer experiment if the incident beam consists of electrons, then the diffracted beam consists of :

(A) Protons
(B) Electrons
(C) α -particle
(D) Neutrons

💬 Discuss

✅ Correct Answer: (B) Electrons

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. Which of the following does not depict the correct link between technology and physics ?

(A) Nuclear reactor – nuclear fusion
(B) Electron microscope – wave nature of induction
(C) Electric generator – laws of electromagnetic induction
(D) Optical fibers – total ternal reflection of light

💬 Discuss

✅ Correct Answer: (C) Electric generator – laws of electromagnetic induction

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. A small magnet of dipole moment M is kept on the arm of a deflection magnetometer sat in tan A position at a distance of 0.2 m. If the deflection is 60°, the value of M is (BH = 0.4 × 10-4 T)

(A) Zero
(B) 0.77 Am²
(C) 10.82 Am²
(D) None

💬 Discuss

✅ Correct Answer: (B) 0.77 Am²

Explanation: the right answer is 2.77Am^2 .

Vikash Gupta

🎓 Tutor III ⭐ 33.56K Points

📊 Science

Q. A cyclotron is used to obtain a 2 meV beam of protons. The alternating potential difference applied between the dees has a peak value of 20 kV and its frequency is 5 MHz. The intensity of magnetic field to be applied for resonance will be: