Capacitors

Steven D'Angelo

03/19/2012

Unit 10 Summary review of units 1-9

1) Electrical pressure is measured in voltage.

2) Electrical current is measured in amps.

3) The symbol for resistance is the greek letter omega.

4) An electrical current is the movement of electrons.

5) The symbol for source voltage is the letter E.

6) Resistance is measured in ohms.

7) The symbol for current is the letter I.

8) Electrical power is measured in watts.

9) The symbol for electrical power is the letter P.

10) Electrical energy is measured in watt-hours.

11) The resistance of a conductor varies directly with its length. (F)

12) Energy per unit time is power. (C)

13) The CSA of wire is usually expressed in circular mils. (B)

14) The resistance of a wire varies inversely with its CSA. (G)

15) The most frequently used conductor of electricity is copper. (A)

16) In wire size tables, the diameter of a wire is expressed in mils. (J)

17) A parallel circuit has more then one path for current. (S)

18) Electrical resistance is measured with an instrument known as an ohmmeter. (E)

19) Higer voltage is obtained by connecting batteries in series. (I)

20) In charging a battery, it should be kept on charge until there is no further increase in specific gravity. (D)

21) To operate properly, electrical components connected in a series circuit must have the same rating with respect to current. (B)

22) To operate properly, electrical components in a parallel circuit must have the same rating with respect to voltage. (A)

23) The major part of the resistance in a correctly wired electrical circuit is usually found in the components. (B)

Refer to Figure 1 for problems 24-30

24) Figure is a series-parallel circuit. (C)

25) The resistance of branch A-B is 5 ohms. (B)

26) If an ohmmeter is connected across R1 it will read 2.5 ohms. (A)

27) If R1 suddenly develops a "short" the total resistance...