Magnetism and Electromagnetism When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage increases reaches zero remains constant decreases increases reaches zero remains constant decreases ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A permanent magnet Attracts all paramagnetic substances and repels others Attracts ferromagnetic substances and repels all others Attracts only ferromagnetic substances Attracts some substances and repels others Attracts all paramagnetic substances and repels others Attracts ferromagnetic substances and repels all others Attracts only ferromagnetic substances Attracts some substances and repels others ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism For a given wirewound core, an increase in current through the coil increases the flux density reverses the flux lines causes no change in flux density decreases the flux density increases the flux density reverses the flux lines causes no change in flux density decreases the flux density ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle will be zero will depend on the amount of e.m.f. applied will be infinite will depend on the radius of the circle will be zero will depend on the amount of e.m.f. applied will be infinite will depend on the radius of the circle ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Two long parallel conductors carry 100 A. If the conductors are separated by 20 mm, the force per meter of length of each conductor will be 10 N 100 N 0.1 N 0.01 N 10 N 100 N 0.1 N 0.01 N ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A certain amount of current flows through a ring shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil? Decreases Remains same First increases and then decreases depending on the depth of iron in¬sertion Increases Decreases Remains same First increases and then decreases depending on the depth of iron in¬sertion Increases ANSWER DOWNLOAD EXAMIANS APP
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