EASY
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What is difference between permeability and permittivity of medium?
Important Questions on Moving Charges and Magnetism
EASY
What is the current in a straight wire. if a magnetic field of is produced at a distance of from it?
MEDIUM
One of the two identical conducting wires of length is bent in the form of a circular loop and the other one into a circular coil of identical turns. If the same current is passed in both, the ratio of the magnetic field at the centre of the loop to that at the centre of the coil i.e. will be
EASY
A square loop is made from a uniform wire as shown in the figure. If a battery is connected between the points then the magnitude of the magnetic field at the center of the square is
HARD
With the help of Biot-Savart law derive the expression for the intensity of magnetic field at a point due to an infinitely long straight conductor carrying current.
EASY
The magnetic field at the origin due to a current element placed at a point with vector position is
MEDIUM
Write Biot-Savart's law in vector form.
EASY
The C.G.S. unit of magnetic field at a point, due to Biot-Savart law is
EASY
Write the name of any two rules to find the direction of magnetic field.
HARD
A non-conducting thin disc of radius rotates about its axis with an angular velocity . The surface charge density on the disc varies with the distance from the center as , where and are constants. If the magnetic induction at the center is , the value of is
EASY
The correct Biot-Savart's law in vector form is
MEDIUM
Write Bio-Savart law in vector form and mentioned the direction of the magnetic field. Which term in the law work as a vector field and produces a magnetic field? Mention one similarity and one dissimilarity between Bio-Savart law for magnetic field and Coulomb’s law for electrostatics.
MEDIUM
A cylindrical conductor of radius is carrying a constant current. The plot of the magnitude of the magnetic field with the distance from the centre of the conductor is correctly represented by the figure.
MEDIUM
What is Biot-Savart's law?
EASY
Two thin metallic wires lie on and -axes and both carry the same current as shown in the figure below. and are the two lines making angles with the axes and the origin of axes is . The magnetic field will be zero
MEDIUM
Write Biot-Savart law.
EASY
Two similar insulated wires are bent in the form of a circle of radius carrying current each in the direction shown as in figure and figure. Which one will have stronger magnetic field at the centre ? Justify.
HARD
State Biot-Savart law. Use this law to obtain the expression for the magnetic field on the axis of a circular current loop.
MEDIUM
Two infinite straight wires apart are carrying currents of and respectively. The distance of the points at which the resultant force is zero is
MEDIUM
In the given figure, the magnetic field at .
MEDIUM
A small current element of length and carrying current is placed at (1, 1, 0) and is carrying current in '+ z' direction. If magnetic field at origin be and at point (2, 2, 0) be then:
