Anonymous
Anonymous asked in Science & MathematicsPhysics · 8 months ago

Which of the following statements are correct for the RC circuit shown? Select true or false for each statement?

After S is in the position b for a long time, the current through R becomes close to zero.

If S is in the position b for a long time, the current through R approaches E/R.

If S is in the position a for a long time, the current through R approaches zero.

Right after S is moved to the position b, following a long time in the position a, the potential across C is nearly zero.

Right after S is moved to the position b, following a long time in the position a, the current through R is zero.

The longer S is kept in the position a, the higher is the energy strored in C.

Right after S is moved to the position a, following a long time in the position b, the current through R is E/R.

Attachment image

1 Answer

Relevance
  • 8 months ago
    Best Answer

    After S is in the position b for a long time, the current through R becomes close to zero. TRUE, cap blocks the current once it is charged

    If S is in the position b for a long time, the current through R approaches E/R. FALSE

    If S is in the position a for a long time, the current through R approaches zero. TRUE cap blocks the current once it is charged

    Right after S is moved to the position b, following a long time in the position a, the potential across C is nearly zero. FALSE

    Right after S is moved to the position b, following a long time in the position a, the current through R is zero. FALSE

    The longer S is kept in the position a, the higher is the energy strored in C. FALSE

    Right after S is moved to the position a, following a long time in the position b, the current through R is E/R. TRUE initial charge on C is zero, and it's voltage is zero, so initially it acts as a short circuit, and current thru R follows ohms law.

    • billrussell42
      Lv 7
      8 months agoReport

      true, in theory it continues to increase, but by smaller and smaller amounts.

      in practice, it reaches a plateau of ½CV² after about 6 time constants.

Still have questions? Get your answers by asking now.