Match the following:

(i)	magnetic flux	(a)	tesla
(ii)	magnetic flux density	(b)	weber
(iii)	relative permeability	(c)	no unit
(iv)	magnetic field intensity	(d)	amper/meter

 

When magnetic flux through a coil is changed, the variation of induced current in the coil with time is as shown in graph. If resistance of coil is $10\Omega$, then the total change in flux of coil will be-

Two co-axial solenoids shown in figure. If key of primary suddenly opened then direction of instantaneous induced current in resistance ' $R$ ' which connected in secondary :-

As a result of change in the magnetic flux linked to the closed loop shown in the figure, an e.m.f. . $\mathrm{V}$volt is induced in the loop. The work done (joules) in taking a charge $Q$ coulomb once along the loop is :-

Figure shows three regions of magnetic field each of area $A$ and in each region magnitude of magnetic field decreases at a constant rate $\alpha$. If $\overrightarrow{E}$ is induced electric field, then value of line integral $\oint \overrightarrow{E}·\mathrm{d}\overrightarrow{r}$ along the given loop is equal to,

The drawing shows a copper wire (of negligible resistance) bent into a circular shape with a radius of $r$. The radial section $BC$ is fixed in plane, while the copper bar $AC$ sweeps around at an angular speed of $\omega$. The bar makes electrical contact with the wire at all times. The wire and the bar have negligible resistance. $A$uniform magnetic field exists everywhere, is perpendicular to the plane of the circle, and has a magnitude of $B$. Which of the following shows the magnitude of the current as a function of $\theta$ ?