HARD
12th ICSE
IMPORTANT
Earn 100

Define radial field and sensitivity of a moving coil galvanometer and also explain the factors on which current sensitivity of a suspended coil galvanometer depends.

Important Questions on Torque on a Current-Loop : Moving-Coil Galvanometer

HARD
12th ICSE
IMPORTANT
What do you understand by shunt? How is it used with a galvanometer to convert into an ammeter, explain with the help of a diagram and obtain the relation  Ig=SS+G I where symbols have their usual meanings.
HARD
12th ICSE
IMPORTANT
Draw a diagram and explain construction of suspended coil galvanometer. Why poles of a permanent magnet are concave (curved) in shape in this galvanometer? Explain why phosphor-bronze strip is used.
HARD
12th ICSE
IMPORTANT
Draw diagram of pivoted galvanometer and explain why is it used in laboratory. Derive expressions for current and voltage sensitivity.
MEDIUM
12th ICSE
IMPORTANT
When a coil of magnetic moment 2.5×10-8JT-1 is placed with its face parallel to a uniform magnetic field, it experiences a torque of 7.5×10-9J. Find the magnitude of the field.
MEDIUM
12th ICSE
IMPORTANT
A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. It is suspended vertically in a uniform horizontal magnetic field of 0.80 T, such that the normal to the plane of the coil makes an angle of 30° with the field direction. Find the magnitude of the torque experienced by the coil.
MEDIUM
12th ICSE
IMPORTANT
A rectangular loop of area 5 m2, has 50 turns and carries a current of 1 A. It is held in a uniform magnetic field of 0.1 T, at an angle of 30° .Calculate the torque experienced by the coil in SI unit.
MEDIUM
12th ICSE
IMPORTANT
A circular coil of radius 6.0 cm and 25 turns carries a current of 10 A. It is suspended vertically in a uniform magnetic field of 1.2 T and the field lines are horizontal in the plane of the coil. Compute the torque acting on the coil.
HARD
12th ICSE
IMPORTANT
A rectangular coil of sides 8.0 cm and 6.0 cm having 2000 turns and carrying a current of 0.20 A is suspended in a uniform magnetic field of 0.20 T directed along the positive X-axis. What is the net force on the coil?