Internet of Things (IoT) Practice Exam

Radio stations send signals far from stations using which type of energy?

1. High power Energy (Kilowatt)

2. High Power Energy (Megawatt)

3. High Frequency (Kilo Hertz)

4. High Frequency (Mega Hertz)

The correct answer is: High power Energy (Kilowatt)

The correct answer focuses on how radio stations effectively transmit signals over vast distances. High power energy, particularly in the magnitude of kilowatts, is utilized to ensure that the radio waves can travel long distances and penetrate various obstacles. This form of energy helps to broadcast signals with sufficient strength to cover a designated area. In the context of radio transmission, power is crucial because it directly influences the range and clarity of the signal. While megawatt power levels exist, they are not typically used for radio station broadcasts, which are more commonly associated with kilowatt levels for effective transmission without excessively high costs or infrastructure requirements. The frequency options, while relevant to the characteristics of the signals being transmitted, do not directly address the power aspect involved in sending signals. High frequency (kilo Hertz or mega Hertz) refers to the range of frequencies that can be utilized for radio communication rather than the energy output or strength required for broadcasting those signals. This distinction clarifies why the focus on energy in kilowatts is appropriate for understanding how radio stations send signals over distances.