JEE Mains Physics 2002-2019 Solved Video Solutions
A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60∘. The torque needed to maintain the needle in this position will be
21
Nov
A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60∘. The torque needed to maintain the needle in this position will be A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60∘. The torque needed to maintain [...]
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2s. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. The time period of this combination will be
21
Nov
The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2s. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. The time period of this [...]
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 μT. What will be its value at the centre of the loop?
21
Nov
The magnetic field due to a current carrying circular loop of radius 3 cm at a point on the axis at a distance of 4 cm from the centre is 54 μT. What will be its value at the centre of the loop? The magnetic field due to a current carrying circular loop of radius [...]
Two long conductors, separated by a distance d carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The new value of the force between them is
21
Nov
Two long conductors, separated by a distance d carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The new value of the force [...]
A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be
21
Nov
A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is B. It is then bent into a circular loop of n turns. The magnetic field at the centre of the coil will be A charged particle moves through [...]
A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B. The time taken by the particle to complete one revolution is
21
Nov
A charged particle of mass m and charge q travels on a circular path of radius r that is perpendicular to a magnetic field B. The time taken by the particle to complete one revolution is A charged particle of mass m and charge q travels on a circular path of radius r that is [...]
A magnetic needle is kept in a non-uniform magnetic field. It experiences:
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Nov
A magnetic needle is kept in a non-uniform magnetic field. It experiences: A magnetic needle is kept in a non-uniform magnetic field. It experiences: November 21, 2021 Category: Chapter 13 - Magnetic Effect of Current , JEE Mains Physics 2002-2019 Solved Video Solutions ,
Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. 3 Ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in Weber/m^2 at the centre of the coils will be (μ0 = 4π × 10^−7 Wb/A-m)
21
Nov
Two concentric coils each of radius equal to 2π cm are placed at right angles to each other. 3 Ampere and 4 ampere are the currents flowing in each coil respectively. The magnetic induction in Weber/m^2 at the centre of the coils will be (μ0 = 4π × 10^−7 Wb/A-m) A circular coil having N [...]
Two thin, long, parallel wires, separated by a distance d carry a current of i A in the same direction. They will:
21
Nov
Two thin, long, parallel wires, separated by a distance d carry a current of i A in the same direction. They will: long parallel wires separated by a distance d carry a current of i A in the same direction. They will: Two thin November 21, 2021 Category: Chapter 13 - Magnetic Effect of Current [...]
A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be
21
Nov
A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be A circular coil having N turns and radius [...]