electrical circuits

When two resistances are connected in series,

• a. voltage across them must be the same

• b. there will be no current in the circuit

• c. current in each resistor will be the same

• d. they will become inductive

2. When one resistance in a series circuit is open

• a. the voltage is zero across the open resistance

• b. the current is zero in all resistances

• c. the current is maximum in the normal resistances

• d. the current increases in the voltage source

3. In electricity, the positive electric charge refers to

• a. atoms

• b. electrons

• c. neutrons

• d. protons

4. In parallel circuit, the total resistance is __________ the value of the smallest

• a. less than

• b. greater than

• c. less than or equal t

• d. greater than or equal to

Which of the following has the least number of valence electrons?

• a. insulator

• b. semi-insulator

• c. conductor

• d. semi-conductor

6. The electromotive force required to cause a current to flow may be obtained I. thermally II. mechanically III. chemically

• a. I only

• b. I and III only

• c. II and III only

• d. I, II, and III

7. In solving series-parallel circuits, generally you would

• . treat it as a series circuit

• c. assume that all loads are equal

• b. reduce it to simplest form

• . treat it as a parallel circuit

8. Which is the best conductor of electricity?

• a. aluminum

• b. silver

• c. copper

• d. steel

10. An electron moves because of the pressure applied to it. What is the resulting process? a. melting b. generating c. flow of current d. magnetic induction

• a. melting

• generating

• flow of current

• magnetic induction

11. The inverse resistance is called

a. reluctance b. conductance c. susceptance d. elastance

• a. reluctance

• b. conductance

• c. susceptance

• . elastance