Module III Chapter 5 Instrumentation

Question 1

voltage

Answer 1

the amount of electrical potential between two locations with different electrical charges is measured in volts

Question 2

amperage

Answer 2

what the current is measured in terms of

Question 3

resistance

Answer 3

the resistance to the flow of the current

Question 4

How is resistance measured?

Answer 4

In terms of heat with a unit called ohms

Question 5

power

Answer 5

the actual amount of energy available in the electrical current

Question 6

power equals

Answer 6

voltage squared over resistance

Question 7

what are the two kinds of current?

Answer 7

1. direct current: flows continuously in one direction

2. alternating current: flows firs in one direction and then in the opposite direction

Question 8

the kind of current you find in a household socket

Answer 8

ac current

Question 9

impedance

Answer 9

ac current behaves differently than dc current and requires a special unit of resistance called impedance

Question 10

capacitor

Answer 10

a component that stores electricity and allows only ac current to pass through it

Question 11

phase

Answer 11

two wave forms that shift from positive to negative at exactly the same rate are said to be in phase, while two that do so at the opposite time are said to be out of phase