MCQ
Ampere’s circuital law states that:
  • A
    The surface integral of magnetic field over the open surface is equal to μ0 times the total current passing through the surface.
  • B
    The surface integral of magnetic field over the open surface is equal to μ0 times the total current passing near the surface.
  • C
    The line integral of magnetic field along the boundary of the open surface is equal to μ0 times the total current passing near the surface.
  • D
    The line integral of magnetic field along the boundary of the open surface is equal to μ0 times the total current passing through the surface.

Answer

  1. The line integral of magnetic field along the boundary of the open surface is equal to μ0 times the total current passing through the surface.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A conducting square loop of side l and resistance R moves in its plane with a uniform velocity u perpendicular to one of its sides. A uniform and constant magnetic field B exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is:

A block is placed on a rough floor and a horizontal force F is applied on it. The force of friction f by the floor on the block is measured for different values of F and a graph is plotted between them.
  1. The graph is a straight line of slope 45°.
  2. The graph is a straight line parallel to the F-axis.
  3. The graph is a straight line of slope 45° for small F and a straight line parallel to the F-axis for large F.
  4. There is a small kink on the graph.

A copper disc of radius 0.1 m is rotated about its centre with 10 revolutions per second in a uniform magnetic field of 0.1 Tesla with its plane perpendicular to the field. The e.m.f. induced across the radius of disc is

(a)  

(b)  

(c) π  

(d) 2π  

A coil resistance 20W and inductance 5H is connected with a 100V battery. Energy stored in the coil will be

(a) 41.5 J

(b) 62.50 J

(c) 125 J  

(d) 250 J

A parallel-plate capacitor is connected to a battery. A metal sheet of negligible thickness is placed between the plates. The sheet remains parallel to the plates of the capacitor:
A nuclear reaction with positive Q value is:
The rest energy involved in a mass of one atomic mass unit is _________ eV.
Two sine waves travel in the same direction in a medium. The amplitude of each wave is A and the phase difference between the two waves is 120°. The resultant amplitude will be:
  1. A
  2. 2A
  3. 4A
  4. $\sqrt{2}\text{A}.$
Resistors are generally colour coded to:
A charged particle moves along a circle under the action of possible constant electric and magnetic fields. Which of the following are possible?
  1. $\text{E}=0,\ \text{B}=0$
  2. $\text{E}=0,\ \text{B}\not=0$
  3. $\text{E}\not=0,\ \text{B}=0$
  4. $\text{E}\not=0,\ \text{B}\not=0$