An electric dipole of moment ‘p’ is placed in an electric field of intensity ‘E’. The dipole acquires a position such that the axis of the dipole makes an angle 0 with the direction of the field. Assuming that the potential energy of the dipole to be zero when θ=900, the torque and the potential energy of the dipole will respectively be
18
Aug
An electric dipole of moment ‘p’ is placed in an electric field of intensity ‘E’. The dipole acquires a position such that the axis of the dipole makes an angle 0 with the direction of the field. Assuming that the potential energy of the dipole to be zero when θ=900, the torque and the potential [...]
An electric dipole is placed at an angle of 30o with an electric field intensity 2×105N/C. It experiences a torque equal to 4Nm. The charge on the dipole, if the dipole length is 2 cm, is
18
Aug
An electric dipole is placed at an angle of 30o with an electric field intensity 2×105N/C. It experiences a torque equal to 4Nm. The charge on the dipole, if the dipole length is 2 cm, is An electric dipole is placed at an angle of 30o with an electric field intensity 2×105N/C. It experiences a [...]
Four electric charges +q,+q,−q and −q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, midway between the two charges +q and +q, is
18
Aug
Four electric charges +q,+q,−q and −q are placed at the corners of a square of side 2L (see figure). The electric potential at point A, midway between the two charges +q and +q, is -q −q and −q are placed at the corners of a square of side 2L (see figure). The electric potential at [...]
The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is :
17
Aug
The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is : is The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the [...]
If a negligibly small current is passed through wire of length 15m and of resistance 5Ω having uniform cross-section of 6×10-7 m2, then coefficient of resistivity of material, is
16
Aug
If a negligibly small current is passed through wire of length 15m and of resistance 5Ω having uniform cross-section of 6×10-7 m2, then coefficient of resistivity of material, is If a negligibly small current is passed through wire of length 15m and of resistance 5Ω having uniform cross-section of 6×10-7 m2 is then coefficient of [...]
Time taken by sunlight to pass through a window of thickness 4mm whose refractive index is 32, is
12
Aug
Time taken by sunlight to pass through a window of thickness 4mm whose refractive index is 32, is is Time taken by sunlight to pass through a window of thickness 4mm whose refractive index is 32 August 12, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - 2019 Physics [...]
A point source of light is placed 4m below the surface of a liquid of refractive index 5/3. The minimum diameter of a disc, which should be placed over the source, on the surface of the liquid to cut off all light out of water, is
12
Aug
A point source of light is placed 4m below the surface of a liquid of refractive index 5/3. The minimum diameter of a disc, which should be placed over the source, on the surface of the liquid to cut off all light out of water, is A point source of light is placed 4m below [...]
If two mirrors are kept inclined at 60° to each other and a body is placed at the middle, then total number of images formed, is
12
Aug
If two mirrors are kept inclined at 60° to each other and a body is placed at the middle, then total number of images formed, is If two mirrors are kept inclined at 60° to each other and a body is placed at the middle is then total number of images formed August 12, 2020 [...]