Question:
A long hollow copper pipe carries a current. The magnetic field producted will be
A long hollow copper pipe carries a current. The magnetic field producted will be
Updated On: May 12, 2024
- inside the pipe only
- outside the pipe only
- both inside and outside the pipe
- zero, bath inside and outside
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Magnetic field is zero inside the current carrying hollow copper pipe but magnetic field exists outside the pipe.
Was this answer helpful?
0
0
Top Questions on Magnetic Field
- A solenoid is 1 m long and 4 cm in diameter. It has five layers of windings of 1000 turns each and carries a current of 7 A. The magnetic field at the centre of the solenoid is
- KCET - 2025
- Physics
- Magnetic Field
- A current of 2 A passes through a coil of 100 turns, producing a magnetic flux of 5 × 10⁻⁵ Wb per turn. What is the magnetic energy associated with the coil?
- SRMJEEE - 2025
- Physics
- Magnetic Field
- Using Biot-Savart law, derive expression for the magnetic field \( \vec{B} \) due to a circular current carrying loop at a point on its axis and hence at its center.
- CBSE CLASS XII - 2025
- Physics
- Magnetic Field
- Considering the case of magnetic field produced by air-filled current carrying solenoid, show that the magnetic energy density of a magnetic field \( B \) is \( \frac{B^2}{2\mu_0} \).
- CBSE CLASS XII - 2025
- Physics
- Magnetic Field
- Two charged particles of specific charges in the ratio 2:1 and masses in the ratio 1:4 moving with same kinetic energy enter a uniform magnetic field at right angles to the direction of the field. The ratio of the radii of the circular paths in which the particles move under the influence of the magnetic field is
- AP EAPCET - 2025
- Physics
- Magnetic Field
View More Questions
Questions Asked in COMEDK UGET exam
A solid cylinder of mass 2 kg and radius 0.2 m is rotating about its own axis without friction with angular velocity 5 rad/s. A particle of mass 1 kg moving with a velocity of 5 m/s strikes the cylinder and sticks to it as shown in figure.
The angular velocity of the system after the particle sticks to it will be:- COMEDK UGET - 2024
- The Angular Momentum
- In a given semiconductor, the ratio of the number density of electron to number density of hole is 2 : 1. If $ \frac{1}{7} $th of the total current is due to the hole and the remaining is due to the electrons, the ratio of the drift velocity of holes to the drift velocity of electrons is :
- COMEDK UGET - 2024
- Semiconductors
- A transformer which steps down 330 V to 33 V is to operate a device having impedance 110 $\Omega$. The current drawn by the primary coil of the transformer is:
- COMEDK UGET - 2024
- Transformers
- In the Young's double slit experiment, the 2nd bright fringe for red light coincides with the 3rd bright fringe for violet light. Then the value of 'n' is: (Given: wavelength of red light = 6300 $\text{Å}$ and wavelength of violet light = 4200 $\text{Å}$)
- COMEDK UGET - 2024
- Youngs double slit experiment
- If 216 drops of the same size are charged at 200 V each and they combine to form a bigger drop, the potential of the bigger drop will be
- COMEDK UGET - 2024
- Electrostatics
View More Questions
Concepts Used:
Magnetic Field
The magnetic field is a field created by moving electric charges. It is a force field that exerts a force on materials such as iron when they are placed in its vicinity. Magnetic fields do not require a medium to propagate; they can even propagate in a vacuum. Magnetic field also referred to as a vector field, describes the magnetic influence on moving electric charges, magnetic materials, and electric currents.
A magnetic field can be presented in two ways.
- Magnetic Field Vector: The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force.
- Magnetic Field Lines: An alternative way to represent the information contained within a vector field is with the use of field lines. Here we dispense with the grid pattern and connect the vectors with smooth lines.
Properties of Magnetic Field Lines
- Magnetic field lines never cross each other
- The density of the field lines indicates the strength of the field
- Magnetic field lines always make closed-loops
- Magnetic field lines always emerge or start from the north pole and terminate at the south pole.