Electric Field Concepts

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Which of the following is a necessary component of every electric circuit?

Energy source (correct)

Magnetic field

Gravitational force

Capacitor

What type of material permits electrons to flow freely from particle to particle?

Semiconductors

Superconductors

Insulators

Conductors (correct)

What is the potential difference between two points in an electric field?

The resistance between the points

The amount of charge at one point

The current flowing between the points

The work needed to transfer a charge of 1 C between the points (correct)

Which type of electric circuit has only one path for current to flow?

Series circuit Signup and view all the answers

What happens to excess charge transferred to an insulator?

It remains at the initial location of charging Signup and view all the answers

What is the unit of potential difference?

Volt Signup and view all the answers

What does electric current measure?

The rate of flow of negative charges Signup and view all the answers

How many electrons pass any point in a wire carrying a current of 1 A each second?

6.25 x 10^18 electrons Signup and view all the answers

What is the resistance of a 120-V electric heater drawing a current of 25 A?

4.8 Ω Signup and view all the answers

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 Signup and view all the answers

What is the magnitude of the electric field at a point located at (4, -2) m?

8,000 N/C Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

An electron is present in an electric field of 10,000 N/C. What is the force on the electron?

-1.6x10^-15 N Signup and view all the answers

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 Signup and view all the answers

What is the definition of an electric field?

The region around a charged object where electric forces are exerted Signup and view all the answers

In which direction do the electric field lines point?

Radially outward from a positive charge and radially inward toward a negative charge Signup and view all the answers

How is the magnitude of the electric field calculated?

By dividing the electric force by the charge Signup and view all the answers

What does it mean when electric field lines are drawn close together?

The field is strong Signup and view all the answers

What is the unit of electric field?

Newton per coulomb (N/C) Signup and view all the answers