Electric Fields & Circuits Quiz

A positive test charge is placed in an electric field. If the electric field points to the left, what can be concluded about the source charge?

• The source charge is also positive and located to the right

• The source charge is negative and located to the right

• The source charge is positive and located to the left

• The source charge is negative and located to the left

• No definitive conclusion can be drawn about the source charge

In Coulomb's Law (Fe = kq1q2/r²), what happens to the electric force if the distance between charges is doubled?

• The force increases by a factor of 4

• The force decreases by a factor of 4

• The force remains constant

• The force increases by a factor of 2

• The force decreases by a factor of 2

A uniform electric field is generated between two parallel plates with a voltage of 12 V and a separation of 0.03 m. What is the magnitude of the electric field?

• 360 V/m

• 400 V/m

• 0.4 V/m

• 4 V/m

• 40 V/m

In a circuit with a 6 Ω resistor and a 12 V battery, what current will flow according to Ohm's Law?

• 0.5 A

• 2 A

• 1 A

• 3 A

• 4 A

Two resistors (R1 = 3 Ω and R2 = 6 Ω) are connected in series. What is the total resistance?

• 1.5 Ω

• 9 Ω

• 6 Ω

• 3 Ω

• 18 Ω

A current-carrying wire experiences a magnetic force. If the angle between the current and magnetic field is 90°, what is the sine of this angle?

• 0

• 0.5

• 1

• -1

• 2

Which statement best describes the relationship between electric charges?

• All charges always attract each other

• Like charges attract, unlike charges repel

• Like charges repel, unlike charges attract

• Charges have no interaction with each other

• Charges only interact when they are touching

In a parallel circuit with resistors R1 = 6 Ω and R2 = 3 Ω, what is the total resistance?

• 9 Ω

• 2 Ω

• 1.5 Ω

• 18 Ω

• 0.5 Ω

A capacitor stores 0.002 C of charge when connected to a 10 V battery. What is its capacitance?

• 0.0002 F

• 0.0005 F

• 0.0001 F

• 0.002 F

• 0.02 F

A charged particle moves perpendicular to a magnetic field. What will be the path of the particle?

• A straight line

• A circular path

• An exponential curve

• A parabolic trajectory

• A zigzag pattern