2-1-10

If the current of a circuit is 4.16 milliamperes and the resistance is one megohm, the voltage of this circuit would be ? . Select one: a.4.16 kV b.41.6 kV c.41,000 V d.46,100 V

A. 4.16kv

The ampere, or amp, is a measure of current flow and is represented by the letter ? . Select one: a.A b.C c.E d.P

A. A

When resistors are connected in series, their values are ? to determine total resistance. Select one: a.added b.divided c.multiplied d.subtracted

A. Added

A(n) ? is a material whose electrons can be moved with relative ease. Select one: a.conductor b.insulator c.isotope d.semiconductor

A. Conductor

The greater the voltage across a fixed resistor, the greater the ? through that resistor. Select one: a.current b.impedance c.opposition d.wattage

A. Current

Current is defined as the flow of ? through a material. Select one: a.electrons b.magnetism c.positive charges d.protons

A. Electrons

Current flowing through a conductor will produce both ? and a magnetic field. Select one: a.heat b.light c.pressure d.voltage

A. Heat

The heat produced by the current flowing through the resistance in a circuit is called ? losses. Select one: a.I'2(R) b.insulation c.radiation d.thermal

A. I'2 (R)

A series circuit has ? current path(s). Select one: a.one b.dual c.multiple d.random

A. One

How much power would be consumed in a parallel circuit that has a source voltage of 480 volts and a total circuit current of 35 amperes? Select one: a.13.71 W b.16.8 kW c.16.8 W d.1,371 W

B. 16.8 kW

A 1,000-watt lamp operates on 277 volts. How much current will this lamp draw? Select one: a.0.361 A b.3.61 A c.5.77 A d.8.277 A

B. 3.61A

Semiconductors have ? electrons in the valence shell. Select one: a.2 b.4 c.7 d.8

B. 4

If a circuit has three branches with currents of 120 amperes, 180 amperes, and 150 amperes, what would be the total current of this circuit? Select one: a.360 A b.450 A c.540 A d.615 A

B. 450 A

The ? method is used to determine the total power in a parallel circuit when the power is determined from the total current, total resistance, and source voltage. Select one: a.algebraic b.direct c.indirect d.reciprocal

B. Direct

Electrical energy can produce ? . Select one: a.electrolytes b.heat c.radiation d.static

B. Heat

A(n) ? is a material whose electrons strongly oppose movement. Select one: a.conductor b.insulator c.isotope d.semiconductor

B. Insulator

Any current-carrying conductor will create a(n) ? field. Select one: a.attracting b.magnetic c.opposing d.polar

B. Magnetic

The electron has an electrical charge with a(n) ? polarity. Select one: a.alternating b.negative c.neutral d.positive

B. Negative

If two 480-volt power sources are connected in parallel to supply a 24-ohm load, how much current will flow in the circuit? Select one: a.0.05 A b.10 A c.20 A d.40 A

C. 20A

How much current will flow through a 2.76-kilohm resistor when 13.8 kilovolts are applied? Select one: a.0.2 A b.2.0 A c.5.0 A d.500 mA

C. 5 A

Voltage is also known as ? force. Select one: a.differential b.electromagnetic c.electromotive d.potential

C. Electromotive

The primary source of electrical power is ? . Select one: a.a battery b.an electron c.magnetism d.nuclear

C. Magnetism

The ? is a unit of resistance in a circuit and is represented by the symbol for omega. Select one: a.ampere b.mho c.ohm d.volt

C. Ohm

The ? is one of the three main parts of an atom. Select one: a.element b.isotope c.proton d.shell

C. Proton

? is a potential difference in electron charges. Select one: a.Amperage b.Resistance c.Voltage d.Wattage

C. Voltage

A device operates on 208 volts and draws 8.0 amperes. How much power does this device consume in watts? Select one: a.166.4 b.206 c.260 d.1,664

D. 1664

If 600 volts is delivered to a circuit that has a resistance of four ohms, how much power would be consumed by the load? Select one: a.9 W b.37.5 W c.75 W d.90 kW

D. 90kW

An increase in the total resistance of a series circuit will cause a(n) ? in the current of that circuit. Select one: a.decrease b.increase c.reversal d.spike

D. Decrease

In calculations, current is represented by the letter ? . Select one: a.A b.C c.E d.I

D. I

The mathematical relationship among current (I), voltage (E), and resistance (R) is called ? Law. Select one: a.Ampere's b.Edison's c.Kirchoff's d.Ohm's

D. Ohm's

As the current flows through each component in a series circuit, it will ? . Select one: a.change polarity b.decrease c.increase d.remain the same

D. Remain the same

What opposes current flow in an electrical circuit? Select one: a.Amperage b.Polarity c.Repulsion d.Resistance

D. Resistance

RT = R1 + R2 +...+ RN is the formula for determining the total resistance in a ? circuit. Select one: a.combination b.current divider c.parallel d.series

D. Series

Friction is a source of ? electricity. Select one: a.dynamic b.magnetic c.molecular d.static

D. Static

In a series circuit, the total voltage source is equal to the algebraic ? of the individual voltage sources. Select one: a.average b.difference c.product d.sum

D. Sum

The ? is a unit of electromotive force that pushes electrons through a conductor and is represented by the symbol V. Select one: a.ampere b.coulomb c.ohm d.volt

D. Volt

A unit of electrical power is the ? and is represented in equations as the letter P. Select one: a.ampere b.electron c.volt d.watt

D. Watt

One horsepower is equal to approximately 746 ? . Select one: a.amperes b.coulombs c.volts d.watts

D. Watts

Adding parallel loads to a circuit will increase the total circuit resistance and decrease the total circuit current. Select one: True False

False

Electrical energy use is measured in ampere-hours which involves how much power is used with respect to time. Select one: True False

False

In series-opposing power sources, the power sources are connected so their polarities are in the same direction. Select one: True False

False

Like charges attract each other and unlike charges repel each other. Select one: True False

False

The proton and electron combine to form the atom's nucleus. Select one: True False

False

Which of the following formulas is the correct expression of Ohm's Law for power?

P=ExI

Adding additional resistors in parallel with those resistors already existing in a parallel circuit will always decrease the total resistance of the circuit. Select one: True False

True

Branch currents in a parallel circuit are always less than the total current of the circuit. Select one: True False

True

Friction was the first known method of generating electricity. Select one: True False

True

If the voltage in a given circuit is increased, the current will increase; but if the resistance is increased, then the current will decrease. Select one: True False

True

In a circuit, current is directly proportional to voltage and inversely proportional to resistance. Select one: True False

True

Ohm's law states that one volt will push one ampere through one ohm of resistance. Select one: True False

True

A circuit has an operating voltage of 480 volts. The circuit resistance is 60 ohms, which limits the current to eight amperes. In order to increase the resistance to limit the current to four amperes, how much total resistance is needed in this circuit? Select one: a.12 Ω b.120 Ω c.210 Ω d.1,920 Ω

b.120 Ω

If the circuit voltage is 12,500 volts and the circuit current is 6.25 amperes, the resistance of the circuit would be ? . Select one: a.200 kΩ b.2,000 Ω c.78,125 kΩ d.200,000 kΩ

b.2,000 Ω

A circuit contains four 160-ohm resistors in parallel. What is the circuit resistance? (Use the rule for determining total resistance with resistances of equal value) Select one: a.4 Ω b.40 Ω c.160 Ω d.640 Ω

b.40 Ω