<span>1. Modern devices use integrated circuits instead of vacuum tubes because integrated circuits occupy less space than vacuum tubes, are more efficient, consumes. The following explains why many modern electronic devices use integrated circuits instead of vacuum tubes:</span>
They are much smaller and more efficient than vacuum tubes.
<span>2. The equation that is used to calculate the amount of electrical energy is the following:
E=P x tE is the energy transferred in kilowatt-hours, kWhP is the power in kilowatts, kW</span>
t is time in hours, h
3. The term voltage describes the work done per unit of charge against a static electric field to move the test charge between two points. It is <span>an electromotive force and also referred to as potential difference. Voltage is expressed in volts. (V). from the given explanations the following is true:</span>
<span>It is the difference in electrical potential energy between two places in an electric field.</span>
