Chapter 5: Magnetism & Matter
NCERT Solutions for CBSE Class 10 Physics — 10 solved questions with detailed explanations.
Solved Questions
Q1. The magnetic susceptibility of a diamagnetic material is:
- Large and positive
- Small and positive
- Small and negative
- Large and negative
Difficulty: Easy · Topic: Magnetic Materials
Solution
Diamagnetic materials have small negative susceptibility (χ ≈ -10⁻⁵ to -10⁻⁹).
Q2. Curie's law states that susceptibility of a paramagnetic material is:
- Independent of temperature
- Proportional to temperature
- Inversely proportional to temperature
- Proportional to T²
Difficulty: Easy-Medium · Topic: Curie's Law
Solution
χ = C/T (Curie's law). Paramagnetic susceptibility decreases with increasing temperature.
Q3. Hysteresis loss in a ferromagnetic material is proportional to:
- Area of B-H loop
- Permeability
- Susceptibility
- Coercivity only
Difficulty: Easy-Medium · Topic: Hysteresis
Solution
Energy lost per cycle = area of the B-H (hysteresis) loop.
Q4. Diamagnetic materials are:
- weakly attracted
- unaffected
- weakly repelled by magnets
- strongly attracted
Difficulty: Easy-Medium · Topic: Magnetic Materials
Solution
weakly repelled by magnets.
Q5. Paramagnetic materials are:
- weakly attracted by magnets
- strongly attracted
- weakly repelled
- unaffected
Difficulty: Easy-Medium · Topic: Magnetic Materials
Solution
weakly attracted by magnets.
Q6. Ferromagnetic materials are:
- weakly repelled
- weakly attracted
- unaffected by fields
- strongly attracted and retain magnetism
Difficulty: Easy-Medium · Topic: Magnetic Materials
Solution
strongly attracted and retain magnetism.
Q7. The Curie temperature is the temperature above which:
- diamagnet becomes ferromagnet
- paramagnet becomes diamagnetic
- ferromagnet becomes paramagnetic
- superconductor becomes normal
Difficulty: Easy-Medium · Topic: Magnetic Materials
Solution
ferromagnet becomes paramagnetic.
Q8. Earth's magnetic field at the equator is approximately:
- vertical
- zero
- horizontal
- oscillating
Difficulty: Easy-Medium · Topic: Magnetic Materials
Q9. Magnetic declination is the angle between:
- geographic south and magnetic south
- geographic north and magnetic north
- two magnetic poles
- horizontal and dip
Difficulty: Easy-Medium · Topic: Magnetic Materials
Solution
geographic north and magnetic north.
Q10. Which material has negative magnetic susceptibility?
- Diamagnetic (e.g., copper, bismuth)
- Ferromagnetic
- Ferrimagnetic
- Paramagnetic
Difficulty: Easy-Medium · Topic: Magnetic Properties
Solution
Diamagnetic materials have small negative susceptibility.
Other Chapters in Physics
Want to practice these questions interactively?
Get instant feedback, track progress, and improve with adaptive practice.
Start Practicing Free →
