## Magnetic Effect Of Current And Magnetism Quiz-2

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.

Q11. A short magnetic needle is pivoted in a uniform magnetic field of strength 1 T. When another magnetic field of strength √3 T is applied to the needle in a perpendicular direction, the needle deflects through an angle Î¸, where Î¸ is
•  30°
•  45°
•  90°
•  60°
Solution

Q12.The magnetic susceptibility does not depend upon the temperature in
•  Ferrite substances
•  Ferromagnetic substances
•  Diamagnetic substances
•  Paramagnetic substances
Solution
Diamagnetic substances

Q13.  The area of hysteresis loop of a material is equivalent to 250 joule. When 10 kg material is magnetized by an alternating field of 50 Hz then energy lost in one hour will be (density of material is 7.5 gm/cm3)
•  6×104 J
•   6×104 erg
•  3×102 J
•  3×102 erg
Solution

Q14.

•  B=H
•  B cosÎ¸=H sin⁡Î¸
•  B sin⁡Î¸=H cos⁡Î¸
•  B=H tan⁡Î¸
Solution

Q15.Keeping dissimilar poles of two magnets of equal pole strength and length same side, their time period will be
•  Zero
•  One second
•  Infinity
•  Any value
Solution

Q16. When two magnetic moments are compared using equal distance method the deflections produced are 45° and 30°. If the length of magnets are in the ratio 1∶2, the ratio of their pole strength is
•  3∶1
• I3∶2
•  √3 ∶1
•  2√3 ∶1
Solution

Q17.If a magnetic dipole of dipole moment M rotated through an angle Î¸ with respect to the direction of the field H, then the work done is
•  MH sin⁡Î¸
•  MH(1-sin⁡Î¸ )
•  MH cos⁡Î¸
•  MH(1-cos⁡Î¸ )
Solution

Q18.The radius of the coil of a tangent galvanometer which has 10 turns is 0.1 m. The current required to produce a deflection of 60° (BH=4×10-5 T) is
•  3 A
•  1.1 A
•  2.1 A
•  1.5 A
Solution

Q19.At a temperature of 30° C, the susceptibility of a ferromagnetic material is found to be X. Its susceptibility at 333° C is
•  X
•  0.5 X
•  2 X
•  0.09 X
Solution

Q20. Magnetic moment of bar magnet is M. The work done to turn the magnet by 90° of magnet in direction of magnetic field B will be
•  Zero
•  1/2 MB
• 2 MB
•  MB
Solution
Work done, W=MB(1-cos⁡Î¸ )
Î¸=90°
∴ W=MB

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