Topic 10 Fields

A positive point charge is placed above a metal plate at zero electric potential. Which diagram shows the pattern of electric field lines between the charge and the plate?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The diagram shows the electric field and the electric equipotential surfaces between two charged parallel plates. The potential difference between the plates is 200 V.B

• A

• B

• C

• D

Which of the following correctly describes the nature of electric potential and electric field

strength?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-5

Which one of the following statements about electric potential gradient is correct?

• Electric potential gradient is numerically equal to the gradient of the electric field.

• Electric potential gradient at a point is numerically equal to the electric field strength at that

  point.

• When one joule of work is done in moving one coulomb of charge between two points, the

  electric potential gradient between the points is one volt per metre.

• When one joule of work is done in moving one coulomb of charge to a point, the electric

  potential gradient at that point is one volt per metre.

Four point charges of equal magnitude Q are placed at the corners of a square as shown below.

The centre of the square is at the origin of the x-axis and the y-axis.

At which position, or positions, is the electric potential due to the four point charges equal to zero?

• At the centre of the square only.

• Along the x-axis only.

• Along the y-axis only.

• Along the x-axis and the y-axis.

Tags

NGSS.HS-PS2-4

A charged particle P is accelerated between two charged metal plates X and Y separated by a distance d. The particle starts from rest at plate X.

The kinetic energy of P, when it reaches plate Y, is K. The magnitude of the charge on P is e.

The magnitude of the electric field strength between the plates is

• $\frac{de}{K}$

• $\frac{d}{Ke}$

• $\frac{K}{de}$

• $\frac{Ke}{d}$

Tags

NGSS.HS-PS3-5

The diagram below shows some lines of equipotential in the region of an electric field.

Which graph best shows the magnitude E of the electric field strength along the line XY?

• 
• 
• 
• 

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The diagram below shows the electric field lines in a region of space. A positively charged particle moves from P to Q.

Which of the following is correct?

• A

• B

• C

• D

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-2

NGSS.HS-PS3-5

The mass of a planet is M and its radius is R. In order for a body of mass m to escape the gravitational attraction of the planet, its kinetic energy at the surface of the planet must be at least

• $\frac{GMm}{R}$

• $\frac{GMm}{R^2}$

• $\frac{GM}{R}$

• $\frac{GM}{R^2}$

Tags

NGSS.HS-PS2-4

The two graphs below represent the variation with distance, d, for d = r to d = 2r of the electric field and the electric potential around an isolated point charge.

The work done by an external force in moving a test charge +q from d = 2r to d = r is equal to q multiplied by the....

• shaded area under graph 1.

• shaded area under graph 2.

• average value of the electric field.

• average value of the electric potential.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5