Magnetic field due to currentHard
Question
If radius of coil becomes two times and current becomes half then magnetic field at centre of the coil will be :-
Options
A.Two times
B.Four times
C.Half
D.One fourth
More Magnetic field due to current Questions
A circular loop of radius 5cm is connected to a source which is providing current 10A as shown in diagram. The ratio of ...A thin non conducting disc of radius R is rotating clockwise (see figure) with an angular velocity w about its central a...A frog can be levitated in a magnetic field produced by a current in a magnetic field produced by a current in a vertica...A frog can be levitated in a magnetic field produced by a current in a magnetic field produced by a current in a vertica...The north pole of a magnet is brought near a metallic ring. Then the direction of the induced current in the ring will b...