Magnetic Field Due to a Straight Current Carrying Conductor

Q.

A current is passed through a straight wire. The magnetic field established around it has its lines of force

1. Circular

2. Elliptical

3. Oval

4. parabolic

Q. State biot-savarts law in vector form . express the magnetic field due to an elemental carrying current I at a distance r from the element

Q. A moving charged particle creates around it =>
(a) A magnetic field
(b) An electric field
(c) Both electric and magnetic fields
(d) Neither electric nor magnetic field

Q. A wire, bent into a circle, carries current in an anticlockwise direction. What polarity does this face of the coil exhibit?

1. North
2. West
3. East
4. South

Q. Find the emf induced in the coil shown in figure .The magnetic fields is perpendicular to the plane of the coil and is constant.

1. Zero
2. Infinity
3. Can't say
4. None of these