Which waves are commonly produced by oscillating electric circuits?(A) Microwaves(B) Radio waves(C) Infrared rays(D) X-Rays

(B) Radio waves are commonly produced by oscillating electric circuits.

Here's why:

1. Oscillating electric circuits are commonly used in the production of electromagnetic waves.

2. Among the options given, radio waves are the type of electromagnetic waves that are most commonly associated with oscillating electric circuits.

3. This is because the frequency of oscillation in these circuits is typically in the range of radio frequencies (RF), which is from 3 kHz to 300 GHz.

4. Microwaves could also be produced by certain high-frequency oscillating electric circuits, but they are not as commonly associated with such circuits as radio waves.

5. Infrared rays and X-Rays are typically not produced by oscillating electric circuits. Infrared rays are more commonly associated with heat radiation, while X-Rays are produced by high-energy processes such as electron transitions in atoms.