Advertisements
Advertisements
प्रश्न
Calculate magnetic flux density of the magnetic field at the centre of a circular coil of 50 turns, having a radius of 0.5m and carrying a current of 5 A.
Advertisements
उत्तर
N = 50 turns, Radius r = 0.5 m, Current I = 5 A
∴ Magnetic flux density at centre = B =`(mu_0NI)/(2a)`
=`(4pi xx10^-7 xx 50xx5)/(2xx0.5) T`
=`2pi xx 10^-7 xx 500 T`
B = 3.14 × 10-4 T
or B = 10-4 π T
APPEARS IN
संबंधित प्रश्न
The current flowing through an inductor of self inductance L is continuously increasing. Plot a graph showing the variation of
Magnetic flux versus the current
Draw a schematic sketch of an ac generator describing its basic elements. State briefly its working principle. Show a plot of variation of
(i) Magnetic flux and
(ii) Alternating emf versus time generated by a loop of wire rotating in a magnetic field.
Figure shows a rectangular loop conducting PQRS in which the arm PQ is free to move. A uniform magnetic field acts in the direction perpendicular to the plane of the loop. Arm PQ is moved with a velocity v towards the arm Rs. Assuming that the arms QR, RS and SP have negligible resistances and the moving arm PQ has the resistance r, obtain the expression for (i) the current in the loop (ii) the force and (iii) the power required to move the arm PQ.
A loop, made of straight edges has six corners at A(0, 0, 0), B(L, O, 0) C(L, L, 0), D(0, L, 0) E(0, L, L) and F(0, 0, L). A magnetic field `B = B_o(hati + hatk)`T is present in the region. The flux passing through the loop ABCDEFA (in that order) is ______.
In a coil of resistance 100 Ω a current is induced by changing the magnetic flux through it. The variation of current with time is shown in the figure. The magnitude of change in flux through the coil is ______.
A circular coil has radius ‘r', number of turns ‘N’ and carries a current ‘I’. Magnetic flux density ‘B’ at its centre is ______.
Which equivalent unit of magnetic flux uses volt and second?
When is magnetic flux zero relative to the plane of the surface?
What is associated with electromagnetic induction?
Why does the number of magnetic field lines entering a closed surface equal the number leaving it?
