Ohm's Law and Electrical Quantities Unit-2

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

10 A

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

120V

A toaster is listed as 1,560W. When it is plugged into a 120V circuit and starts to make toast, how many amperes will it draw?

13

An electrical device is listed as 3,000 watts. Approximately how many horsepower is this?

4 hp

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

60 Ω

The _______ is equal to one coulomb per second

Ampere

What is the term for an amount of charge equal to 6.25 x 10*18 electrons

C

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

Closed

In normal operation, current flows through the hot, grounding, and neutral conductors

False

The neutral conductor is also referred to as the ________ conductor

Grounded

The velocity of AC through a conductor is ________ the speed of light because magnetic fields travel more slowly in material dielectrics than they do through free air

Less than

Conventional current flow theory states that current flows from the most positive point to the most ________?

Negative

The unit of resistance to current flow is the ________?

Ohm

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. This is the _______ law

Ohm's

The statement "in a DC circuit, the current is directly proportional to voltage and inversely proportional to resistance" is known as ________ law

Ohm's

Electron flow theory states that current flows from the most negative point in the circuit to the most _________?

Positive

An opposition to current flow that occurs in alternating current circuits is called _______?

Resistance

Opposition to current flow is called ________?

Resistance

A(n) ________ circuit generally occurs when the conductors leading from and back to the power source become connected

Short

The grounding conductor is used to help prevent a shock hazard in the event that the ungrounded, or hot, conductor comes in contact with the case or frame of the appliance

True

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

True

Voltage pushes current through a wire, but voltage cannot flow through a wire

True

The unit of electrical "pressure" that causes current to flow is called the ________

Volt

________ is also referred to as electromotive force (EMF)

Voltage

The ________ is used to measure electrical power being used in a circuit

Watt

If a circuit is open, current ________ flow

Will not