A magnet of length `10 cm` and pole strength `4xx10^(-4)Am` is placed in a manetic field of induction `2xx10^(-5)weber m^(-2)`, such that the axis of the magnet makes an angel `30^(0)` with the lines of induction. The moment of the couple acting on the magnet is

A bar magnet of pole strength 2 A-m is kept in a magnetic field of induction 4xx10^(-5) Wbm^(-2) such that the axis of the magnet makes an angle 30^(@) with the direction of the field. The couple acting on the magnet is found to be 80xx10^(-7) N-m. Then, the distance between the poles of the magnet is

A bar magnet of pole strnegth 2A-m is kept in a magnetic field of induction 4xx10^(-5)wbm^(-2) such that the axis of the magnet makes an angle 30^(@) with the directon of the field. The couple acting on the magnet is found 80xx10^(-7)N-m . Then the distance between the poles of the magnet is

The magnetic moment of a length 10 cm and pole strength 4.0 Am will be

The length of a bar magnet is 10 cm and its pole strength is 10^(-3) Weber. It is placed in a magnetic field of induction 4 pi × 10^(-3) Tesla in a direction making an angle 30^(@) with the field direction. The value of torque acting on the magnet will be –

The length of a bar magnet is 10 cm and its pole strength is 10^(-3) Weber. It is placed in a magnetic field of induction 4 pi × 10^(-3) Tesla in a direction making an angle 30^(@) with the field direction. The value of torque acting on the magnet will be –

The couple acting on a magnet of length 10 cm placed in a uniform magnetic field of intensity 40 NA^(-1)m^(-1) such that the axis of the magnet makes 45^(@) with the field direction is sqrt2/10 Nm . The pole strength of the magnet (in Wb) is