Electric Dipole

The frequencies of vibration for pipes depend on whether they are open or closed. For a closed organ pipe, the frequency for the -th mode is given by: Where: - is the harmonic number (for the 3rd mode, ), - is the speed of sound in air, - is the length of the pipe. For an open organ pipe, the frequency for the -th mode is given by: Now, comparing the frequency for the 3rd mode in both cases: - For the closed pipe, , - For the open pipe, . The ratio of the frequencies is: Thus, the ratio of the frequencies is , meaning the open pipe's frequency is twice that of the closed pipe for the 3rd mode.

Concept:
Physics - Electric Potential of a Dipole.
Step 1: State the formula for dipole potential.
For a dipole with dipole moment , the electric potential at a distance from the centre (where ) is: $ \theta \theta = 0^{\circ} 180^{\circ} $