What is the composition of an atom?

What is the composition of an atom?

a. Protons and neutrons in the nucleus and electrons in the shell.
b. Electrons and neutrons in the nucleus and protons in the shell.
c. Electrons and nucleus in the neutron and protons in the shell.
d. Protons and electrons in the nucleus and neutrons in the shell.






Answer: A

A conductor's resistance is

A conductor's resistance is

a) directly proportional to its length
b) directly proportional to its diameter
c) inversely proportional to its length
d) not affected by the cross-sectional area
e) measured in micro-Newtons







Answer: A

Under normal circumstances, the heat produced by the electrical wires of a circuit is very small due to the

Under normal circumstances, the heat produced by the electrical wires of a circuit is very small due to the

a) large diameter of the conductor
b) low resistance of the conductor
c) long length of the conductor
d) insulation wrapped around
e) small diameter of the conductor




Answer: B

Most conductors tend to

Most conductors tend to

a) increase in resistance with increase in temperature
b) decrease in resistance with increase in temperature
c) shrink when heated
d) melt when voltage is applied
e) oscillate when voltage is applied

Answer: A

A conductor's resistance is

A conductor's resistance is

a) directly proportional to its cross-sectional area
b) directly proportional to its diameter
c) inversely proportional to its cross-sectional area
d) not affected by the cross-sectional area
e) measured in micro-Newtons






Answer: C

Current flow is inversely proportional to the

Current flow is inversely proportional to the

a) voltage
b) amperage
c) resistance
d) wattage
e) conductance

Answer: C

Current flow is

Current flow is

a) proportional to the applied voltage
b) proportional to the resistance
c) reversed by a resistance
d) increased by a decrease in applied voltage
e) inversely proportional to the applied voltage





Answer: A

Equivalent resistance is decreased

Equivalent resistance is decreased

a) when voltage is decreased
b) when a circuit is in parallel
c) if the amperage is increased
d) when a circuit is in series
e) when a circuit is opened

Answer: B

In an equivalent circuit developed from a multi-resistor series circuit

In an equivalent circuit developed from a multi-resistor series circuit

a) the resistance will be the reciprocal sum of the original resistances
b) voltage drop will be the same as for each of the original resistances
c) the sum of voltage drops across the original resistances will be equal to the voltage drop of the equivalent circuit
d) original circuit resistances will each have to be the same as the equivalent resistance
e) amperage flowing will be different than the original circuit amperage flowing through each resistance

Answer: C

A material that conducts electrical current is called

A material that conducts electrical current is called

a) a volt
b) a conductor
c) a circuit
d) an electromotive force
e) a conduit






Answer: B

Since the discovery of electrons, it has been determined that electrons are a negative charge and flow from

Since the discovery of electrons, it has been determined that electrons are a negative charge and flow from

a) positive to negative
b) north to south
c) negative to positive
d) a lower potential to a higher potential
e) the battery to the source





Answer: C

The flow of electrons in a uniform direction is called

The flow of electrons in a uniform direction is called

a) voltage drop
b) electrical current flow
c) potential difference
d) electromotive force
e) direct current




Answer: B

When a number of electrons pass a given point over a specific time period the energy may be referred to as

When a number of electrons pass a given point over a specific time period the energy may be referred to as

a) an ampere
b) voltage
c) an ohm
d) power or watts
e) electromotive force




Answer: A

In an atom the electrons

In an atom the electrons

a) orbit around each other
b) are repelled by the neutrons
c) are attracted to the protons
d) are large in size when compared to the protons
e) orbit only the neutrons






Answer: C

An open circuit is one in which:

An open circuit is one in which:

a. A switch is closed
b. The current flows through the resistance
c. The wires are bare
d. A switch is open
e. Voltage may exit






Answer: D

If the power dissipated by a resistor is 1.2 kW when supplied with 110 V, the amperage will be _____ A.

If the power dissipated by a resistor is 1.2 kW when supplied with 110 V, the amperage will be _____ A.

a. 91.666
b. 0.11
c. 19.006
d. 10.91
e. 132






Answer: D

A basic law of electricity is, unlike charge attract each other and like charges:

A basic law of electricity is, unlike charge attract each other and like charges:

a. Repel each other
b. Hold each other
c. Attract each other
d. Neutralize each other
e. Amplify each other





Answer: A

An electrical device that is designed to start and stop currents flow is the:

An electrical device that is designed to start and stop currents flow is the:

a. Power supply
b. Fuse
c. Circuit breaker
d. Switch
e. Resistor





Answer: D

Electrons are negatively charged particles:

Electrons are negatively charged particles:

a. Flowing through the atom's center
b. Orbiting about the nucleus of an atom
c. Firmly attached to the neutrons of an atom
d. That can easily flow through insulators
e. That seek open circuits






Answer: B

Three resistances of 20, 50 and 80 O make up a series circuit. The supply voltage is 400 V. The current flowing would be:

Three resistances of 20, 50 and 80 O make up a series circuit. The supply voltage is 400 V. The current flowing would be:

a. 2.67 A
b. 20 A
c. 8 A
d. 5 A
e. 0.375 A





Answer: A