List of top Physics Questions on Magnetic Effects Of Electric Current asked in MHT CET

The magnetic field intensity (H) at the centre of a long solenoid having 'n' turns per unit length and carrying a current I, when no material is kept in it is (\(μ_0\) = permeability of free space)

Two long conductors separated by a distance ' d ' carry currents ' $\text{I}_1$ ' and ' $\text{I}_2$ ' in the same directions. They exert a force ' $F$ ' on each other. The distance between them is increased to ' $3 \text{ d}$ '. If new repulsive force of magnitude ' $\frac{2}{3} \text{ F}$ ' is found between these conductors, the required change in the magnitude and direction of one of the currents in the conductor is respectively}

Two long conductors separated by a distance ' d ' carry currents ' $\text{I}_1$ ' and ' $\text{I}_2$ ' in the same directions. They exert a force ' $F$ ' on each other. The distance between them is increased to ' $3 \text{ d}$ '. If new repulsive force of magnitude ' $\frac{2}{3} \text{ F}$ ' is found between these conductors, the required change in the magnitude and direction of one of the currents in the conductor is respectively}