CBSE 2026 Class 10 Physics One Mark Important Questions

Students appearing for the CBSE Class 10 Examinations 2026 can check the CBSE 2026 Class 10 Physics One Mark Important Questions available here.

Mohith Kumar

Updated on - Jan 6, 2026 | 11:25:00 AM

Check CBSE 2026 Class 10 Physics One Mark Important Questions Here.

CBSE 2026 Class 10 Physics One Mark Important Questions: As per the revised schedule, the Central Board of Secondary Education (CBSE) will conduct the CBSE Class 10 Examination 2026 from February 17 to March 10, 2026. Likewise, the CBSE Class 10 Science Examination 2026 will be held on February 25, 2026. The Class 10 Science Examination is divided into an 80-mark theory paper and a 20-mark internal assessment. In the 80-mark theory examination, Physics and Chemistry will have a weightage of 25 marks each, and Biology will have a weightage of 30 marks. Students appearing for the CBSE Class 10 Examinations 2026 can check the CBSE 2026 Class 10 Physics One Mark Important Questions available here.

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CBSE 2026 Class 10 Physics One Mark Important Questions

Check the CBSE Class 10 Physics One Mark Important Questions 2026 below.

Question 1: A concave mirror of radius 30 cm is placed in water. It's focal length in air and water differ by____
Answer: Zero

Question 2: As light travels from a rarer to a denser medium it will have
Answer: decreased velocity and decreased wavelength

Question 3: The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be:
Answer: virtual, upright and diminished in size

Question 4: You are given three media A, B and C of refractive index 1.33, 1.65 and 1.46. The medium in which the light will travel fastest is
Answer: A

Question 5: When object moves closer to convex lens, the image formed by it shift
Answer: first away and then towards the lens

Question 6: When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
Answer: at 90 degree

Question 7: On which of the following does not exert any force when kept in uniform magnetic field?
Answer: Stationary Charge

Question 8: For making a strong electromagnet, the material of the core should be
Answer: soft iron

Question 9: The direction of magnetic field around a straight conductor carrying current can be determined by
Answer: right hand thumb rule

Question 10: Magnetic field is produced by the flow of current in a straight wire. This phenomenon was discovered by
Answer: Oersted

Question 11: If an electron is travelling horizontally towards east. A magnetic field in vertically downward direction exerts a force on the electron along
Answer: towards the South

Question 12: Why is the absolute refractive index of a medium always greater than 1?
Answer: Because the speed of light in any medium is always less than its speed in a vacuum.

Question 13: Magnetic lines of force inside current carrying solenoid are
Answer: along the axis and are parallel to each other.

Question 14: If the power of a lens is (-2.0) D, what is its focal length and nature?
Answer: f=-50 cm; Concave lens

Question 15: Why is a fuse wire made of a material with a low melting point?
Answer: To melt and break the circuit during current overflow

Question 16: What is the frequency of AC supply in India?
Answer: 50 Hz

Question 17: Does the resistivity of a wire change if its length is doubled?
Answer: No, it only depends on the material and temperature.

Question 18: Why do two magnetic field lines never intersect?
Answer: Because at the point of intersection, the compass would point in two directions, which is impossible

Question 19: What does the thumb represent in the Right-Hand Thumb Rule?
Answer: Direction of Current

Question 20: How many Joules are there in 1 kWh?
Answer: 3.6×10 to the power of 6 J

Students must ensure to thoroughly practice of NCERT Exemplar Problems as many one-mark MCQs are derived directly from them.

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