Advertisements
Advertisements
प्रश्न
Draw a neat and labelled diagram of suspended coil type moving coil galvanometer.
उत्तर १
Suspended type of moving coil galvanometer:-
PQRS = Rectangular coil
W = Thin phosphor bronze wire suspension
M = Plane mirror
H = Helical spring
C = Soft iron cylinder
I = Current through the coil
उत्तर २
Moving Coil Galvanometer -
APPEARS IN
संबंधित प्रश्न
Write the expression for the magnetic moment `vecm`due to a planar square loop of side ‘l’ carrying a steady current I in a vector form.
In the given figure this loop is placed in a horizontal plane near a long straight conductor carrying a steady current I1 at a distance l as shown. Give reason to explain that the loop will experience a net force but no torque. Write the expression for this force acting on the loop.
The torque on a current loop is zero if the angle between the positive normal and the magnetic field is either θ = 0 or θ = 180°. In which of the two orientations, the equilibrium is stable?
A circular loop of area 1 cm2, carrying a current of 10 A, is placed in a magnetic field of 0.1 T perpendicular to the plane of the loop. The torque on the loop due to the magnetic field is
A circular loop of radius a, carrying a current i, is placed in a two-dimensional magnetic field. The centre of the loop coincides with the centre of the field (figure). The strength of the magnetic field at the periphery of the loop is B. Find the magnetic force on the wire.
A rectangular wire-loop of width a is suspended from the insulated pan of a spring balance, as shown in the figure. A current i exists in the anti-clockwise direction in the loop. A magnetic field B exists in the lower region. Find the change in the tension of the spring if the current in the loop is reversed.
A current loop of arbitrary shape lies in a uniform magnetic field B. Show that the net magnetic force acting on the loop is zero.
The figure shows a circular wire loop of radius a and carrying a current i, which is placed in a perpendicular magnetic field B. (a) Consider a small part dl of the wire. Find the force on this part of the wire exerted by the magnetic field. (b) Find the force of compression in the wire.
Suppose that the radius of cross-section of the wire used in the previous problem is r. Find the increase in the radius of the loop if the magnetic field is switched off. Young's modulus of the material of the wire is Y.
A rectangular loop of sides 20 cm and 10 cm carries a current of 5.0 A. A uniform magnetic field of magnitude 0.20 T exists parallel to the longer side of the loop. (a) What is the force acting on the loop? (b) What is the torque acting on the loop?
A circular loop carrying a current i is made of a wire of length L. A uniform magnetic field B exists parallel to the plane of the loop. (a) Find the torque on the loop. (b) If the same length of the wire is used to form a square loop, what would be the torque? Which is larger?
Torque acting on a rectangular coil carrying current 'l' situated parallel to magnetic field of induction 'B', having number of turns 'n' and area 'A' is ______.
A triangular loop of side `l` carries a current I. It is placed in a magnetic field B such that the plane of the loop is in the direction of B. The torque on the loop is ____________.
A small cylindrical soft iron piece is kept in a galvanometer so that
A rectangular coil has 200 turns each of area 50 cm2 . It is capable of rotation about an axis joining the mid points of two opposite sides. When a current of 10 A is passed through it while its plane is at right angles to a uniform magnetic field, it experiences a torque of 5 Nm. The magnetic field will be ____________.
The sensitivity of a milliammeter of range 0 to 50 mA is x `"div"/"mA"`. If it is converted into an ammeter of range 500 mA by using a suitable shunt then the sensitivity will be ________.
Two galvanometers 'G1' and 'G2' require 2 mA and 3 mA respectively to produce the same deflection. Then _______.
If the net magnetic force acting on a loop is zero then ____________.
Which one of the following statements is 'NOT' TRUE? Sensitivity of a moving coil galvanometer can be increased by ____________.
In suspended type of moving coil galvanometer ____________.
Two cylinders A and B of the same material have same length, their radii being in the ratio 1 : 2 respectively. The two are joined end to end as shown in the figure. One end of cylinder A is rigidly clamped while free end of cylinder B is twisted through an angle θ. The angle of twist of cylinder A is ______.
When the plane of the coil is parallel to the field, torque will be ______
A circular coil having N turns and radius r carries a current I. It is held in the XZ plane in a magnetic field `Bhati`. The torque on the coil due to the magnetic field is ______.
A current of 10 A is flowing in a wire of length 1.5 m. A force of 15 N acts on it when it is placed in a uniform magnetic field of 2 T. The angle between the magnetic field and the direction of the current is ______.
Equal current i flows in two segments of a circular loop in the direction shown in figure. Radius of the loop is r. The magnitude of magnetic field induction at the centre of the loop is ______.
A thin flexible wire of length L is connected to two adjacent fixed points and carries a current I in the clockwise direction, as shown in the figure. When the system is put in a uniform magnetic field of strength B going into the plane of the paper, the wire takes the shape of a circle. The tension in the wire is ______.
