The bipolar technique uses:

The bipolar technique uses:

• A. Two electrodes of equal size producing essentially equal current density under them; both electrodes are active.
• B. A single active electrode with a distant return pad.
• C. An electrode array with one inactive electrode.
• D. Monopolar arrangement with a large dispersive pad.

Answer: (A)

In bipolar stimulation, current flows directly between two active electrodes placed on the body. Having two active electrodes of similar size produces roughly equal current density under each pad, creating a focused, localized field between them and reducing spread to distant tissues. This is in contrast to monopolar setups, where one active electrode and a distant large dispersive pad create a broader, less targeted stimulation. The equal-size, two-active-electrode arrangement is the defining feature of the bipolar approach, which is why this option best fits.

In bipolar stimulation, current flows directly between two active electrodes placed on the body. Having two active electrodes of similar size produces roughly equal current density under each pad, creating a focused, localized field between them and reducing spread to distant tissues. This is in contrast to monopolar setups, where one active electrode and a distant large dispersive pad create a broader, less targeted stimulation. The equal-size, two-active-electrode arrangement is the defining feature of the bipolar approach, which is why this option best fits.