ELE 100-Quiz 3

Unit of power

Watts

unit of energy

joules

Electric companies base their bills on the unit called

kilowatt-hour

If you measured your body resistance while your palms were damp, your ohmmeter would get a _________________ reading than if measured with your palms dry

lower

It takes less than 1 A of current to kill you if it travels through your heart.

true

Unit of voltage

volts

A series circuit contains five resistors. The total resistance for the circuit is 186Ω. The values of four of the resistors are:20Ω,14Ω,10Ω and 100Ω. What is the value of fifth resistor?

42 ohms

What is the current flowing in a 20Ω resistor, when the voltage E=120Volts?

6 amps

If you have two 3000 ohm resistors in series, what is the total resistance?

6 k ohms

Voltage sources cannot be added in series if they equal values and same polarities

False

A circuit has 3.2 A and 110 V. Determine its power.

352 watts

A voltage of 9V is placed across a 27 Ω resistor. What is the value of the current flowing through it?

0.33 amps

How much current flows in a circuit with a 1.5-volt battery and three 1 ohm resistances (bulbs) in series?

0.5 A

If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?

11 V

Current through a 100 Ω resistor that is to be used in a circuit is 0.15 A. What is the power being absorbed by the resistor?

2.25 watts

If you were to place a 3000 Ω resistor across a 9 volt battery, what would be the power dissipated from this resistor?

27 mW

Which law is described by the following equation: V or E = I x R?

Ohm's law