m4 electric field strength

Which of the following is a true statement about the electric field between the two plates?

• The field is attractive between the plates and uniform in strength
• The field is repulsive between the plates and uniform in strength
• The field is attractive between the plates and strongest near the positive
• The field is repulsive between the plates and strongest near the positive

Which graph best represents the relationship between the strength of an electric field and distance from a point charge?

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Which quantity and unit are correctly paired?

• electric field strength and N/C
• electricity and Coulombs
• electrostatic force and electrons
• electric field strength and E

What is the symbol for electric field strength?

• B

• E

• F

• T

Where would you find a uniform electric field?

• around a single charge

• between two charged metal plates

• inside a coil that carries a current

• around a magnet

The diagram shows a pair of metal plates 4.0 mm apart connected to a 9.0 V battery.

What is the electric field between the plates?

• 4.4 x 10^-4 NC^-1

• 3.6 x 10^-2 NC^-1

• 2.3 NC^-1

• 2.3 x 10³ NC^-1

Two horizontal parallel plate conductors are separated by a distance of 5.0 mm in air.

The lower plate is earthed and the potential of the upper plate is +50 V.

What is the electric field strength E at a point midway between the plates?

• 1.0 x 10⁴ Vm^-1 upwards

• 1.0 x 10⁴ Vm^-1 downwards

• 2.0 x 10⁴ Vm^-1 upwards

• 2.0 x 10⁴ Vm^-1 downwards

The diagram shows two parallel plates.

What is the electric field strength at point P?

• the same as that point Q

• twice that at point R

• half that at point Q

• one third that at point R

State the SI unit of electric charge.

• Coulomb (C)

• Ampere (A)

• Ohm (Ω)

• Volt (V)

Explain the concept of electric field lines and their significance.

• Electric field lines have no significance in the study of physics.

• Electric field lines are only visible in a vacuum.

• Electric field lines are used to measure the temperature of charged objects.

• Electric field lines help visualize the direction and strength of the electric field around charged objects.