154057 A bar magnet is equivalent to :

154066 A proton enters a magnetic field of intensity $\mathbf{1}\mathbf{.}\mathbf{5}$ $\mathrm{Wb}/{\mathrm{m}}^2$ with a velocity $2\times {10}^7\mathrm{m}/\mathrm{s}$ in a direction at an angle ${30}^{\circ }$ with the field. The force on the proton will be (charge on proton is $1.6\times {10}^{-19}\mathrm{C}$ )

153986 A large magnet is broken into two pieces, so that their lengths are in the ratio $2:1$. Then, the pole strength of the two pieces will be in the ratio:

154057 A bar magnet is equivalent to :

154066 A proton enters a magnetic field of intensity $\mathbf{1}\mathbf{.}\mathbf{5}$ $\mathrm{Wb}/{\mathrm{m}}^2$ with a velocity $2\times {10}^7\mathrm{m}/\mathrm{s}$ in a direction at an angle ${30}^{\circ }$ with the field. The force on the proton will be (charge on proton is $1.6\times {10}^{-19}\mathrm{C}$ )

153979 The hard ferromagnetic material among the following is

153986 A large magnet is broken into two pieces, so that their lengths are in the ratio $2:1$. Then, the pole strength of the two pieces will be in the ratio:

154057 A bar magnet is equivalent to :

154066 A proton enters a magnetic field of intensity $\mathbf{1}\mathbf{.}\mathbf{5}$ $\mathrm{Wb}/{\mathrm{m}}^2$ with a velocity $2\times {10}^7\mathrm{m}/\mathrm{s}$ in a direction at an angle ${30}^{\circ }$ with the field. The force on the proton will be (charge on proton is $1.6\times {10}^{-19}\mathrm{C}$ )

153979 The hard ferromagnetic material among the following is

153986 A large magnet is broken into two pieces, so that their lengths are in the ratio $2:1$. Then, the pole strength of the two pieces will be in the ratio:

154057 A bar magnet is equivalent to :

154066 A proton enters a magnetic field of intensity $\mathbf{1}\mathbf{.}\mathbf{5}$ $\mathrm{Wb}/{\mathrm{m}}^2$ with a velocity $2\times {10}^7\mathrm{m}/\mathrm{s}$ in a direction at an angle ${30}^{\circ }$ with the field. The force on the proton will be (charge on proton is $1.6\times {10}^{-19}\mathrm{C}$ )

153979 The hard ferromagnetic material among the following is

153986 A large magnet is broken into two pieces, so that their lengths are in the ratio $2:1$. Then, the pole strength of the two pieces will be in the ratio: