Question Answers

A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction 4×10 −4 T. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point 2.0 cm away from the wire is Two very [...]

A vertical wire kept in Z-X plane carries a current from q to P. The magnetic field due to current will have the direction at the origin O along A vertical wire kept in Z-X plane carries a current from q to P. The magnetic field due to current will have the direction at the [...]

A straight section PQ of a circuit lies along the x–axis from x = – to x = and carries a current I. The magnetic field due to the section PQ at point x = + a will be A straight section PQ of a circuit lies along the x–axis from x = – to [...]

Two parallel beams of protons and electrons, carrying equal currents are fixed at a separation d. The protons and electrons move in opposite directions. There is a point P on the straight perpendicular line joining the two beams at a distance x from one beam. The magnetic field at this point is B. If B [...]

Two very thin metallic wires placed along X and Y axes carry equal currents as shown AB and CD are lines at 45∘ with the axes having origin at O the magnetic field will be zero on the line Two very thin metallic wires placed along X and Y axes carry equal currents as shown [...]

Two long wires PQR and MNP carry equal current I as shown such that QR and NP are parallel. Find the magnetic field at origin O. Two long wires PQR and MNP carry equal current I as shown such that QR and NP are parallel. Find the magnetic field at origin O. September 9, 2020 [...]

An infinitely long wire carrying current I is along Y-axis such that its one end is at point A(0,b) while the wire extends up to +∞. The magnitude of magnetic field strength at point (a,0) is 0) is An infinitely long wire carrying current I is along Y-axis such that its one end is at [...]

If c is the speed of electromagnetic waves in vaccum, its speed in a medium of dielectric constant K and relative permeability mu, is If c is the speed of electromagnetic waves in vaccum is its speed in a medium of dielectric constant K and relative permeability mu September 9, 2020 Category: Uncategorised (JEE Advanced [...]

Electromagnetic waves travel in a medium which has relative permeability 1.3 and relative permittivity 2.14. Then the speed of the electromagnetic wave in the medium will be Electromagnetic waves travel in a medium which has relative permeability 1.3 and relative permittivity 2.14. Then the speed of the electromagnetic wave in the medium will be September [...]

A spring of spring constant k is broken in the length ratio 1:3. The spring constant of larger part will be A spring of spring constant k is broken in the length ratio 1:3. The spring constant of larger part will be September 8, 2020 Category: Cengage NEET by C.P Singh , Chapter 6 - [...]