Radio interference occurs in telecommunication lines because of:
- Electro static induction
- Electromagnetic induction
- Both of these
- None of these
Correct answer: 3. Both of these
Explanation:
- Electrostatic Induction:
- Electrostatic induction occurs when there is a buildup of electric charges on objects, creating an electric field around them.
- In telecommunication lines, especially those with unshielded conductors, electrostatic induction can lead to interference. The electric field created by nearby power lines or other electrical equipment can induce unwanted charges on the telecommunication lines, causing disturbances.
- Electromagnetic Induction:
- Electromagnetic induction occurs when a changing magnetic field induces an electromotive force (EMF) or voltage in a conductor.
- Telecommunication lines can pick up electromagnetic interference from nearby sources such as power lines, radio transmitters, or other electronic devices. The changing magnetic fields produced by these sources can induce currents in the telecommunication lines, leading to unwanted signals and interference.