Is there any magnetic field inside a conductor?
Yes, a magnetic field is present inside a conductor.
Is there current inside a conductor?
The electric field inside an ideal conductor will be zero when under static conditions. In this case, a current can flow without an electric field present inside the conductor.
What is the magnetic field inside a hollow cylinder?
Inside the hollow cylinder: Magnetic field inside the hollow cylinder is zero.
Is there magnetic field inside a hollow wire?
Surprisingly, the field of a hollow wire with constant current is homogeneous. We also find that there is no magnetic field inside the hole if it is exactly at the center of the wire. Furthermore, the field points perpendicular to the direction of the hole’s displacement to the center of the wire, ey⊥dex.
What is magnetic field formula?
The equation for the magnetic field strength (magnitude) produced by a long straight current-carrying wire is: B=μ0I2πr. For a long straight wire where I is the current, r is the shortest distance to the wire, and the constant 0=4π10’7 T…m/A is the permeability of free space.
What is a cylindrical conductor?
A cylindrical conductor of radius R is carrying a 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 : LEARNING APP.
Why are wires cylindrical?
The fact that current that flows through the wire is depended on the wire cross section area, the circular shape is the maximized area for a given amount of material; therefore, a cylindrical wire is much more efficient.
Is cylindrical conductor of length?
A cylindrical conductor of length L and uniform area of cross-section A has resistance R. Another conductor of length 2L and resistance R of the same material has an area of cross-section.
With increasing temperature, the resistance of the wire increases as collisions within the wire increase and “slow” the flow of current.
In this formula, R=Resistance, L=Length and A= Cross sectional Area, and rho is the resistivity which is constant. Hence, the area of cross section will be 2A of another cylinder, So we conclude that the answer is option C.
Is medical conductor of length L and uniform area of cross section A has resistance r the area of cross section of another conductor of same material and same resistance but of length 2L is?
In this case, the length of the conductor is doubled (2L) and so the resistance will be 2R. For the resistance to remain the same as R, the area of cross-section is also doubled as 2A. Hence, the area of cross-section is 2A.
How does the area a affect the resistance?
More collisions mean more resistance. Second, the cross-sectional area of the wires will affect the amount of resistance. Wider wires have a greater cross-sectional area. In the same manner, the wider the wire, the less resistance that there will be to the flow of electric charge.
What is the 2nd line of defense immune system?
The second line of defense is nonspecific resistance that destroys invaders in a generalized way without targeting specific individuals: Phagocytic cells ingest and destroy all microbes that pass into body tissues. For example macrophages are cells derived from monocytes (a type of white blood cell).
What are four basic line of Defence mechanism?
The immune system includes three lines of defense against foreign invaders: physical and chemical barriers, nonspecific resistance, and specific resistance. The first line of defense are the physical and chemical barriers, which are considered functions of innate immunity.
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