Question

Which six of the following statements are TRUE?

A. Things in the IoT have some intelligence and the ability to exchange information with other things.
B. Electricity is a form of thermal energy.
C. According to Ohm's Law, the higher the voltage, the smaller the resistance.
D. For a given voltage, a small resistance allows the flow of more electric current than a big resistance.
E. Capacitors and inductors store energy.
F. Diodes behave like a small resistor when they are forward biased.
G. Bipolar Junction Transistors (BJTs) are widely used in modern digital electronics because they consume a negligible amount of current during transitions.
H. Increasing the sampling rate of an ADC would increase the quality of the acquired signal.
I. A 10-bit DAC, with a reference voltage of 5 volts, cannot produce positive and negative voltages.
J. The Arduino Uno microcontroller board has all the hardware necessary to implement a simple IoT thing.

Answer 1

The true statements about IoT, energy storage by capacitors and inductors, diode behavior when forward biased, BJTs in digital electronics, ADC sampling rate, and the capabilities of the Arduino Uno board in regards to simple IoT implementations are A, E, F, G, H, and J respectively.

Step-by-step explanation:

Out of the provided statements, the six TRUE statements are:

• A. Things in the IoT have some intelligence and the ability to exchange information with other things.
• E. Capacitors and inductors store energy.
• F. Diodes behave like a small resistor when they are forward biased.
• G. Bipolar Junction Transistors (BJTs) are widely used in modern digital electronics because they consume a negligible amount of current during transitions.
• H. Increasing the sampling rate of an ADC would increase the quality of the acquired signal.
• J. The Arduino Uno microcontroller board has all the hardware necessary to implement a simple IoT thing.

Statement B is incorrect because electricity is not a form of thermal energy, rather it is a form of energy due to the movement of charged particles. Statement C is misleading; according to Ohm's Law, if the voltage increases, the current increases provided resistance stays constant. Statement D is correct in stating that for a given voltage a smaller resistance allows more electric current flow than a bigger resistance. Statement I is incorrect because a 10-bit DAC with a reference voltage of 5 volts can produce only positive voltages up to 5 volts and not negative voltages.