MAGNETISM AND MATTER Quiz-11
Dear Readers,
As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.
Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.
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Q1. The magnetic lines of force inside a bar magnet
Solution
Inside bar magnet, lines of force are from south to north.
Inside bar magnet, lines of force are from south to north.
Q2. A current loop placed in a magnetic field behaves like a
Solution
Magnetic dipole
Magnetic dipole
Q3. Two small bar magnets are placed in a line with like poles facing each other at a certain distance d apart. If the length of each magnet is negligible as compared to d, the force between them will be inversely proportional to
Solution
Q4. Magnetic dipole moment is a
Solution
vector quantity
vector quantity
Q5.The materials suitable for making electromagnets should have
Solution
Electromagnets are made of soft iron. The soft iron has high retentivity and low corectivity.
Electromagnets are made of soft iron. The soft iron has high retentivity and low corectivity.
Q6. Isogonic lines on magnetic map will have
Solution
Same angle of declination
Same angle of declination
Q7.The time period of a vibration magnetometer is T0. Its magnet is replaced by another magnet whose moment of inertia is 3 times and magnetic moment is 1/3 of the initial magnet. The time period now will be
Solution
Q8.If magnetic lines of force are drawn by keeping magnet vertical, then number of neutral points will be
Solution
One
One
Q9.The magnetic moment of a magnet is 0.1 amp ×m2. It is suspended in a magnetic field of intensity3×10-4 Wbm-2. The couple acting upon it when deflected by 30° from the magnetic field is
Solution
Ï„=MB sinθ=0.1×3×10-4 sin30° =1.5×10-5 N-m
Ï„=MB sinθ=0.1×3×10-4 sin30° =1.5×10-5 N-m
Q10. The variation of magnetic susceptibility (χ) with magnetising field for a paramagnetic substance is
Solution
Susceptibility of a paramagnetic substance is independent of magnetising field
Susceptibility of a paramagnetic substance is independent of magnetising field
