Electromagnetism

The force on a charge q moving with velocity v perpendicular to a magnetic field B is:

• 1 q v B
• 2 q v / B
• 3 Zero
• 4 q B / v

A charged particle moving along the direction of a magnetic field experiences:

• 1 Maximum force
• 2 A force opposite to motion
• 3 A force along the field
• 4 No force

The magnetic field inside a solenoid depends on:

• 1 Only its length
• 2 Only its radius
• 3 Its colour
• 4 Turns per unit length and current

Ampere's law relates the line integral of B around a closed loop to the:

• 1 Flux
• 2 Current enclosed
• 3 Mass
• 4 Charge enclosed

A galvanometer is converted into an ammeter by connecting a:

• 1 Capacitor in parallel
• 2 Battery in series
• 3 Large resistance in series
• 4 Small resistance in parallel

The direction of force on a current carrying conductor in a field is given by:

• 1 Fleming's left hand rule
• 2 Lenz's law
• 3 Gauss's law
• 4 Fleming's right hand rule

The SI unit of magnetic flux density is the:

• 1 Weber
• 2 Tesla
• 3 Gauss only
• 4 Henry

The torque on a rectangular coil in a magnetic field is maximum when the plane of the coil is:

• 1 Parallel to the field
• 2 Never
• 3 At 45 degrees only
• 4 Perpendicular to the field