A wire loop enclosing as semicircle of radius `R` is located on the boudary of uniform magnetic field `B`. At the moment `t=0`, the loop is set into rotation with a costant angular acceleration `alpha` about an axis `O` coinciding with a line of vector B on the boundary. Find the emf induced in the loop as a function of time. Draw the approximate plot of this function.The arrow in the figure shows the emf direction taken to be positive.

A wire loop enclosing a semicircle of radius R islocated on the boundary of a uniform magnetic field B . At the moment t = 0 , the loop is set into rotation with constant angular acceleration alpha about an axis O . The clockwise emf direction is taken to be positive. The variation of emf as a function of time is

A wire loop enclosing a semicircle of radius R islocated on the boundary of a uniform magnetic field B . At the moment t = 0 , the loop is set into rotation with constant angular acceleration alpha about an axis O . The clockwise emf direction is taken to be positive. The variation of emf as function of time is

A wire loop enclosing a semi-circle of radius a=2cm is located on the boundary of a uniform magnetic field of induction B=1T (figure).At the moment t=0 the loop is set into rotation with a constant angular acceleration beta=2 rad//sec^(2) about an axis O coinciding with a line of vector B on the boundary.The emf induced in the loop as a function of time t is [x xx10^(-4)(-1)^(n)xxt]V , where n=1,2,... is the number of the half-revolution taht the loop performs at the given moment t .Find the value of x .(The arrow in the figure shows the emf direction taken to be positive, at t=0 loop was completely outside)

A circular loop of metal wire of radius r is placed perpendicular to uniform magnetic field B. Half of the loop is folded about the diameter with constant angular velocity omega . If resistance of the loop is R then current in the loop is

A metallic loop is placed in a nonuiform magnetic field. Will an emf be induced in the loop?

A circular flexible loop of wire of radius r carrying a current I is placed in a uniform magnetic field B . If B is doubled, then tension in the loop

A circular wire loop of radius r is placed in a region of uniform magnetic field B such that the plane of the loop makes an angle theta with the direction of B. In which of the following conditions, will no emf be induced in the loop?

A wire bent as a parabola y=kx^(2) is located in a uniform magnetic field of induction B, the vector B being perpendicular to the plane xy. At t=0 , the sliding wire starts sliding from the vertex O with a constant acceleration a linearly as shown in Fig. Find the emf induced in the loop -