2.which explains why many modern electronic devices use integrated circuits instead of vacuum tubes? they are smaller but less efficient than vacuum tubes. they are much smaller and more efficient than vacuum tubes. they are more efficient but larger than vacuum tubes. 3. which equation is used to calculate the amount of electrical energy used? e = p + t e = t – p e = t ÷ p e = p × t 4.what is voltage? it is the flow of an electric charge that regularly reverses direction. it is the difference in electrical potential energy between two places in an electric field. it is the flow of an electric charge in only one direction. it is the sum of the electrical potential energy between two places in an electric field.

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:

They are much smaller and more efficient than vacuum tubes.

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 an electromotive force and also referred to as potential difference. Voltage is expressed in volts. (V). from the given explanations the following is true:

It is the difference in electrical potential energy between two places in an electric field.

second mirror gathers light from a faraway object and reflects it to another mirror. - a.