20 Questions
Which of the following is a necessary component of every electric circuit?
Energy source
What type of material permits electrons to flow freely from particle to particle?
Conductors
What is the potential difference between two points in an electric field?
The work needed to transfer a charge of 1 C between the points
Which type of electric circuit has only one path for current to flow?
Series circuit
What happens to excess charge transferred to an insulator?
It remains at the initial location of charging
What is the unit of potential difference?
Volt
What does electric current measure?
The rate of flow of negative charges
How many electrons pass any point in a wire carrying a current of 1 A each second?
6.25 x 10^18 electrons
What is the resistance of a 120-V electric heater drawing a current of 25 A?
4.8 Ω
What must be the minimum rating of the fuse in the electric circuit to which a 120-V toaster with a resistance of 12 Ω is connected?
10 A
What is the magnitude of the electric field at a point located at (4, -2) m?
8,000 N/C
If the charge q = +1.6x10^-19 C moves in an electric field of 1.0 kV/m, what is the force experienced by the charge?
1.6x10^-16 N
A charge of -4 nC is located at (0,1) m. What is the magnitude of the electric field at this point?
-6,000 N/C
An electron is present in an electric field of 10,000 N/C. What is the force on the electron?
-1.6x10^-15 N
Two point charges are located in the y-axis; q1 = 5nC at y = -4 and q2 = -10nC at y = 2. What is the magnitude and direction of the electric field at y = -2?
Magnitude: 10,000 N/C, Direction: Downward
What is the definition of an electric field?
The region around a charged object where electric forces are exerted
In which direction do the electric field lines point?
Radially outward from a positive charge and radially inward toward a negative charge
How is the magnitude of the electric field calculated?
By dividing the electric force by the charge
What does it mean when electric field lines are drawn close together?
The field is strong
What is the unit of electric field?
Newton per coulomb (N/C)
Test your knowledge about electric field concepts, including electric force, field lines, and the behavior of charged objects within the field.
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