A cylindrical conductor of radius R carrying current `i` along the axis such that the magnetic field inside the conductor varies as `B=B_(0)r^(2)(0lt r leR)`, then which of the following in incorrect?

A cylinderical conductor of radius R is carrying constant current. The plot of the magnitude of the magnetic field, B with the distance, d from the centre of the conductor , is correctly represented by the figure:

A cylinderical conductor of radius R is carrying constant current. The plot of the magnitude of the magnetic field, B with the distance, d from the centre of the conductor , is correctly represented by the figure:

A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the conductor is correctly represented by the figure:

A thin, straight conductor lies along the axis of a hollow conductor of radius R . The two carry equal currents in the same direction. The magnetic field B is plotted against the distance r from the axis. Which of the following best represents the resulting curve?

A hollow cylindrical conductor of radii a and b carries a current I uniformly spread over its cross-section. Prove that the magnetic field induction B for point inside the body of the conductor at a distance r from the axis of cylinder is given by, B=(mu_0mu_rI(r^2-a^2))/(2pi(b^2-a^2)r)

A toroid with mean radius r_(0) , diameter 2a have N turns carrying current l. What is the magnetic field B inside the the toroid?

A toroid with mean radius r_(0) , diameter 2a have N turns carrying current l. What is the magnetic field B inside the the toroid?

A long cylindrical conductor of radius R carries a current i as shown in the figure. The current density J varies across the cross-section as J = kr^(2) , where, k is a constant. Find an expression for the magnetic field B at a distance r (lt R) from the axis