Electric Potential

Question 1

An electron is placed at x= 1 m in a region where the electric potential is given by V(x) = (10 V/m)x. Which statement is true?
The electric field in this region is constant as a function of x and points in the positive x direction
The electric field in this region increases linearly with x and points in the negative x direction
The electron will move with constant velocity in the negative x direction
The electron will move with constant acceleration in the positive x direction

Answer 1

The electron will move with constant acceleration in the positive x direction

Question 2

Which statement is true of an electron or proton in a region of space where the only force on the particle is from the electric field?
An electron will reduce its electrical potential energy by moving to a region of high electric potential
An electron will increase its electrical potential energy by moving to a region of high electric potential
Both a proton and an electron will reduce their electrical potential energy by moving to a region of lower electric potential
A proton will increase its electrical potential energy by moving to a region of lower electric potential

Answer 2

An electron will reduce its electrical potential energy by moving to a region of high electric potential

Question 3

What causes lightning to strike the ground during a thunderstorm?
The electric field generated by the Earth’s molten metal core
A large potential difference between the Earth’s surface and the cloud(Correct)
A high local electron flux
Global warming

Answer 3

Global warming

jk… its ‘A large potential difference between the Earth’s surface and the cloud’

Question 4

Two charges,q1 and q2, are held at a distance d apart. Which statement is correct?
The magnitude of the stored electrical potential energy is bigger if the charges have the same sign
The magnitude of the stored electrical potential energy is bigger if the charges have opposite signs
The magnitude of the stored electrical potential energy is independent of the relative sign of the charges

Answer 4

The magnitude of the stored electrical potential energy is bigger if the charges have the same sign