HARD
TS EAMCET
IMPORTANT
Earn 100

A wire loop enclosing a semi-circle of radius is located on the boundary of a uniform magnetic field of induction At time , the loop is set into rotation with velocity ? about its axis , coinciding with a line of vector on the boundary as shown in the figure. The emf induced in the loop is


(a)
(b)
(c)
(d)

32% studentsanswered this correctly

Important Questions on Electromagnetic Induction and Alternating Current
EASY
TS EAMCET
IMPORTANT
A metal disc of radius rotates with a constant angular speed of about its axis. The potential difference between the centre and the rim of the disc under a uniform magnetic field directed perpendicular to the disc, is

EASY
TS EAMCET
IMPORTANT
A conducting wire bent in the shape of semicircle has length L and moves in its plane with constant velocity v. A uniform magnetic field exists in the direction perpendicular to the plane of the wire. The velocity makes an angle to the diameter joining free ends and the emf induced between the ends of the wire is . The value of constant is

EASY
TS EAMCET
IMPORTANT
A long straight solenoid with a cross-sectional radius and number of turns per unit length has a current varying with time as The magnitude of the electric field as a function of distance from the solenoid axis is,

EASY
TS EAMCET
IMPORTANT
An infinitely long cylinder is kept parallel to an uniform magnetic field directed along the positive -axis. The direction of induced current as seen from the -axis will be

EASY
TS EAMCET
IMPORTANT
Two straight conducting rails form a right angle as shown below. A conducting bar in contact with the rails starts at the vertex at time and moves with constant velocity of along them. A magnetic field with is directed out of the page. The absolute value of the around the triangle at the time will be?


EASY
TS EAMCET
IMPORTANT
A coil of resistance is connected across a battery. If the current in the coil is found to be after the time battery is connected, then the inductance of the coil is

EASY
TS EAMCET
IMPORTANT
A sinusoidal voltage with a frequency of is applied to a series circuit with a resistance of , inductance of and a capacitance of . The magnitude of impedance of the circuit is close to

EASY
TS EAMCET
IMPORTANT
An alternating current is given by The R.M.S. current in amperes is,
