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AP Intermediate 2nd Year Electric Charges and Fields — practice questions — page 4

Explore 103 free Electric Charges and Fields questions in AP Intermediate 2nd Year Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Electric Charges and Fields questions and exercises with answers

Showing questions 91–103 of 103.

Two capacitors of 4 µF and 6 µF are connected in parallel and charged by a 10 V battery. The total charge stored isRead the answer and worked solution →NEET · Physics · Capacitors — Series or ParallelRead the answer and worked solution →Four equal point charges q sit at the corners of a square of side d. The work needed to assemble this configuration from infinity isRead the answer and worked solution →An electric dipole of moment p is placed in a uniform field E. The work done to rotate it from the orientation θ = 0 (aligned with the field) to θ = 180° isRead the answer and worked solution →Electric field at any point inside a hollow charged conductor isRead the answer and worked solution →On an equipotential surface, the work done in moving a test charge between any two points isRead the answer and worked solution →A parallel-plate capacitor in vacuum has plate area A and separation d. Its capacitance isRead the answer and worked solution →The work done in bringing a charge q from infinity to a point where the potential is V isRead the answer and worked solution →True or false: electrostaticsRead the answer and worked solution →A convex lens forms a real image at $60$ cm on one side of an object placed $20$ cm in front of it. Find the focal length of the lens.Read the answer and worked solution →Electric potential is a:Read the answer and worked solution →When light passes from one medium to another, which property remains **unchanged**?Read the answer and worked solution →NEET · Physics · Electric Charges & Fields · Force on Dipole in FieldRead the answer and worked solution →

Worked practice questions

Two capacitors of 4 µF and 6 µF are connected in parallel and charged by a 10 V battery. The total charge stored is

  1. 24 µC
  2. 60 µC
  3. 40 µC
  4. 100 µC
Show answer and solution

Correct answer: D. 100 µC

1. Parallel ⇒ Cₑ = 4 + 6 = 10 µF. 2. Q = Cₑ V = 10 × 10 = 100 µC. 3. Distractors come from using just one of the capacitors, or the series formula. _Source: syllabus Physics Part I, Ch 2 §2.14.2_

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NEET · Physics · Capacitors — Series or Parallel

Read exercise and reference answers
Items
  1. Item
    1/C_eq = 1/C₁ + 1/C₂
    Answer
    left
  2. Item
    C_eq = C₁ + C₂
    Answer
    right
  3. Item
    Same charge on each capacitor
    Answer
    left
  4. Item
    Same voltage across each cap
    Answer
    right
  5. Item
    C_eq smaller than every member
    Answer
    left
  6. Item
    C_eq larger than every member
    Answer
    right
Categories
Left
Series formula
Right
Parallel formula
Instructions
Sort each property: applies in series or parallel?

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Four equal point charges q sit at the corners of a square of side d. The work needed to assemble this configuration from infinity is

  1. (kq²/d)(2 + 1/√2)
  2. (kq²/d)(4 + √2)
  3. (kq²/d)(4 + 2/√2)
  4. (kq²/d)(1 + 1/√2)
Show answer and solution

Correct answer: C. (kq²/d)(4 + 2/√2)

1. Pairs: 4 sides at distance d (4 pairs) and 2 diagonals at distance d√2 (2 pairs). 2. Total PE = k q²[(4/d) + (2/(d√2))] = (k q²/d)(4 + 2/√2). 3. The work done from infinity equals this PE since the field at infinity does no work. _Source: syllabus Physics Part I, Ch 2 Example 2.4_

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