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