A square loop `ACDE` of area `20 cm^2 ` resistance `5Omega` is rotate in as magnetic field `B=2T` through `180^@` (a) in `0.01S` and (b) in `0.02 s`
Find the magnitudes of averasge values of e i and `/_\q` in both the cases.

A square loop of side 20 cm and resistance 0.30 Omega is placed in a magnetic field of 0.4 T. The magnetic field is at an angle of 45^(@) to the plane of loop. If the magnetic field is reduced to zero in 0.5 s, then find the induced emf and induced current in the loop in this time interval.

A coil of area 2m^2 and resistane 4Omega is placed perpendicular to a uniform magnetic field of 4T . The loop is rotated by 90^@ in 0.1 second. Choose the correct options.

A square metal wire loop of side 20 cm and resistance 2Omega is moved with a constant velcoity v_(0) in a uniform magnetic field of induction B = 1 Wb//m^(2) as shown in the figure. The magnetic field lines are perpendicular to the plane of the loop. The loop is connected to a network of resistance each of value 5Omega . The resistances of the lead wires BF and AE are negligible. What should be the speed of the loop, so as to have a steady current of 2 mA in the loop? Give the direction of current in the loop.

A circular conducting loop of area 100 cm^(2) and resistance 3 Omega is placed in a magnetic field with its plane perpendicular to the field. If the field is spatially uniform but varies with time t (in second) as B(t) = 1.5 cos omega t tesla, the peak value of the current in the loop is

A square loop of side 10 cm and resistance 0.5 Omega is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in the north-east direction. The magnetic field is decreased to zero in 0.70 s at a steady rate. The magnetude of current in this time-interval is.

A circular loop of radius R=20 cm is placed in a uniform magnetic field B=2T in xy -plane as shown in figure. The loop carries a current i=1.0 A in the direction shown in figure. Find the magnitude of torque acting on the loop.

A metallic ring of area 25 cm^(2) is placed perpendicular to a magnetic field of 0.2 T .Its is removed from the field in 0.2 s .Find the average emf produced in the ring during this time.

Figure show a square loop of side 0.5 m and resistance 10Omega . The magnetic field has a magnitude B=1.0T . The work done in pulling the loop out of the field slowly and uniformly in 2.0s is

In the figure shown a semicircular wire loop is placed in a uniform magnetic field B=1.0T . The plane of the loop is perpendicular to the magnetic field. Current i=2A flows in the loop in the directions shown. Find the magnitude of the magnetic force in both the cases a and b . The radius of the loop is 1.0 m