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Electric Flux. Gauss Law Practice Questions

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14.6Electric Flux. Gauss Law

Physics Revision Questions for Electric Flux. Gauss Law

1) A circular loop of cm radius is placed inside a uniform electric field produced by two metal parallel plates connected to a 21 V battery, as shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Electric Flux. Gauss Law

The plates are 10 cm apart. What is the electric flux passing through the loop if the area vector of the loop forms a 40° angle to the direction of the electric field? Take π = 22/7, cos 40° = 0.766 and sin 40° = 0.643 if needed.

  1. 800 V × m
  2. 80 V × m
  3. 8 V × m
  4. 0.8 V × m

Correct Answer: D

2) The lines of a uniform electric field fall perpendicular to the left face of a regular triangular prism as shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Electric Flux. Gauss Law

What is the net flux on the prism if the value of electric field is 200 V/m?

  1. 1.2 V × m
  2. 2.4 V × m
  3. -1.2 V × m
  4. -2.4 V × m

Correct Answer: C

3) The lines of a 20 V/m uniform electric field fall perpendicular to the base of a cylinder of base radius 4 cm and height 12 cm. What is the net flux flowing at this system?

Physics Tutorials: This image provides visual information for the physics tutorial Electric Flux. Gauss Law
  1. 0.005 V × m
  2. 0.01 V × m
  3. 0
  4. - 0.01 V × m

Correct Answer: C

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