A long cylindrical conductor of radius R carries a current such that current density j varies across the cross-section as j = αr³ where α is a constant and r is distance from axis of the cylinder. Then magnetic field B(r) will be (for r < R)
If a series LCR circuit at resonance has a quality factor of Q and applied volta
NextA bar magnet is dropped through a horizontal aluminium ring (having a small cut)
Which of the following is not the unit of length :
Medium-- The speed of light in a medium is 1.5 × 10⁸ m/s. The critical angle for this medium with respect
MediumThe frequency of an electromagnetic wave in free space is 2 MHz. When it passes through a medium of
Easy-- In a p-type semiconductor, the majority charge carriers are
Easy-- The energy of an electron in nth orbit of hydrogen atom is E_n = -13.6/n² eV. The energy required
Medium-- Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with like poles
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