Magnetism and Electromagnetism The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is 3,125 V 2,000 V 1,000 V 31.25 V 3,125 V 2,000 V 1,000 V 31.25 V ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A keeper is used to Change the direction of magnetic lines Restore lost flux Provide a closed path for flux Amplify flux Change the direction of magnetic lines Restore lost flux Provide a closed path for flux Amplify flux ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism In the left hand rule, forefinger always represents direction of force on the conductor current Voltage magnetic field direction of force on the conductor current Voltage magnetic field 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 0.1 N 100 N 0.01 N 10 N 0.1 N 100 N 0.01 N 10 N ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will Decreases Remain same None of the listed here Increases Decreases Remain same None of the listed here Increases ANSWER DOWNLOAD EXAMIANS APP
Magnetism and Electromagnetism Paramagnetic materials have relative permeability slightly less than unity equal to unity slightly more than unity equal to that ferromagnetic mate rials slightly less than unity equal to unity slightly more than unity equal to that ferromagnetic mate rials ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS