Deck 2: Electrical Quantities and Ohm S Law

Question 1

The amount of electrical power being used in a circuit is measured in ____.

A) amperes
B) volts
C) ohms
D) watts

Answer 1

D

Question 2

The amount of potential necessary to cause one coulomb to produce one joule of work is a(n) _____.

A) ampere
B) ohm
C) volt
D) watt

Answer 2

C

Question 3

What law states that the force of electrostatic attraction or repulsion is directly proportional to the product of the two charges and inversely proportional to the square of the distance between them?

A) Ampere's Law
B) Coulomb's Law
C) Ohm's Law
D) Volt's Law

Answer 3

B

Question 4

What is another term for electromotive force (EMF)?

A) Amperage
B) Ohmage
C) Voltage
D) Wattage

Question 5

If a circuit is open, current _____ flow.

A) will
B) will not

Question 6

A grounding conductor helps prevent a shock hazard in the event that an ungrounded, or hot, conductor comes in contact with the case or frame of an appliance.

Question 7

During normal operation of a typical 120-volt appliance circuit, current flows through the hot, grounding, and neutral conductors.

Question 8

A complete circuit is often referred to as a(n) _____ circuit.

A) closed
B) open
C) shorted
D) grounded

Question 9

Voltage flows through an electric circuit like water flows through a pipe.

Question 10

The grounding prong of a plug should never be cut off or bypassed.

Question 11

The statement, "In a DC circuit, the current is directly proportional to voltage and inversely proportional to resistance," is know as _____ law.

A) Ampere's
B) Coulomb's
C) Ohm's
D) Volt's

Question 12

What causes a wire to become warm when current flows through it?

A) amperage
B) resistance
C) voltage
D) divergence

Question 13

An electrical circuit has a voltage of 50 V and a resistance of 5 Ω . What is the value of current?

A) 10 A
B) 45 A
C) 55 A
D) 250 A

Question 14

An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor?

A) 60
B) 118
C) 122
D) 240

Question 15

The velocity of AC through a conductor is _____ the speed of light.

A) equal to
B) greater than
C) less than

Question 16

One coulomb per second is equal to one _____.

A) ampere
B) ohm
C) volt
D) watt

Question 17

The unit of resistance to current flow is the _____.

A) ampere
B) ohm
C) volt
D) watt

Question 18

What type of circuit generally occurs when the conductors leading from and back to the power source become connected?

A) short
B) grounded
C) open
D) closed

Question 19

Approximately how many horsepower is a n electrical device listed as 3,000 watts ?

A) 1/4
B) 1/6
C) 4
D) 6

Question 20

The neutral conductor is also referred to as the _____ conductor.

A) hot
B) grounded
C) short
D) safety

Question 21

An electric circuit has a resistance of 20 Ω. The current is measured to be 6 A. How many volts are applied to the circuit?

A) 3 1/3
B) 14
C) 26
D) 120

Question 22

Conventional current flow theory states that current flows from the most positive point to the most _______________.

Question 23

The theory concerning current flow that is most widely accepted as being correct is the _______________ flow theory.

Question 24

A toaster is listed as 1560 W. When it is plugged into a 120 V circuit and starts to make toast, how many amperes will it draw?

A) 13
B) 1440
C) 1680
D) 187,200

Question 25

What standard prefix in engineering notation indicates multiplication by 1,000,000,000?

A) kilo (K)
B) tera (T)
C) giga (G)
D) mega (M)