Question

Which two of the following are analog signals? A) whether a place of business is open or closed B) the volume of the radio C) the number of fingers on my hand D) the outdoor temperature

Answer 1

Answer: B) The volume of the radio and D) the outdoor temperature.

Explanation:

The analog signal is the signal that continuously varying with the time and it continuous analog signal. Analog signal is basically used to carry information or data from one device to another device.

The volume of the radio is the example of the analog signal as it carry voice from one place to another. The analog signal  is the type of signal that use to measure the particular change in the physical phenomena like pressure, sound and temperature in the environment. So, outdoor temperature is also the example of analog signal.

And the other options (A) and (C) are incorrect because it is represent any physical change in the environment.