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12 Questions

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Electric Dipole Concepts

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Questions and Answers

What is an electric dipole?

A single point charge

A pair of equal and opposite point charges (correct)

Multiple point charges with varying magnitudes

A pair of similar point charges

Where is the centre of an electric dipole located?

At one of the charges

At an arbitrary point in space

At infinity

Mid-point between the two charges (correct)

Why is the total charge of an electric dipole zero?

Because the distance between the charges is zero

Because the charges are different in magnitude

Because the charges are equal and opposite (correct)

Because the charges are equal and same

What happens to the electric field of an electric dipole at large distances?

It falls off faster than 1/r^2 Signup and view all the answers

Where are the electric field results simple when considering an electric dipole?

On the dipole axis and in the equatorial plane Signup and view all the answers

What happens to the electric fields due to the separated charges in an electric dipole at large distances?

They nearly cancel out Signup and view all the answers

What is the formula for the electric field at a point on the axis of a dipole?

$E = p - \frac{q}{4\pi\varepsilon_0} \frac{1}{r^2}$ Signup and view all the answers

In what scenario does the dipole field at large distances not involve the charge q and separation a separately?

When r >> a Signup and view all the answers

What is the formula for the electric field at a point on the equatorial plane of a dipole?

$E = -\frac{p}{4\pi\varepsilon_0} \frac{1}{r}$ Signup and view all the answers

What is the formula for the dipole moment vector of an electric dipole?

$p = q \times 2a$ Signup and view all the answers

At what point does the magnitude of the dipole field depend only on the distance r?

On the equatorial plane Signup and view all the answers

Which formula represents the electric field at a point on the axis of a dipole at large distances?

$E = \frac{2p}{4\pi\varepsilon_0} \frac{1}{r}$ Signup and view all the answers