Karnataka PUC II Science magnetism_and_matter — practice questions
14 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Karnataka PUC II Science magnetism_and_matter in the app →Magnetic field lines around a bar magnetThe torque on a magnetic dipole of moment m placed in uniform external field B isThe potential energy of a magnetic dipole in an external uniform field B isIf a bar magnet is cut into two pieces transverse to its length, each pieceGauss's law for magnetism states that the net magnetic flux through ANY closed surface isThe axial field of a short bar magnet of moment m at large distance r isThe equatorial field of a short bar magnet of moment m at large distance r isA magnetic needle is in stable equilibrium when its magnetic moment m isThe far-field of a bar magnet at distance r >> l is similar to that ofThe pole strength of a magnet has SI unitThe work required to rotate a magnetic dipole of moment m in a field B from θ = 0 to θ = 180° isTwo identical-looking iron bars A and B; one is a magnet, the other unmagnetised iron. The CORRECT test using Which of the following is INCORRECT about magnetic field lines?The magnetic moment vector m of a bar magnet points