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Physics 2011 JAMB Past Questions

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41
The diagram above show the positions of a cone. The position which can be described as neutral equilibrium is represented as
  • A. Z only
  • B. X only
  • C. Y and Z
  • D. Y and X
View Answer & Discuss (1) JAMB 2011
42

The correct expression for the potential at a point distance r from a charge q in an electric field is?

  • A.
    _q2
    4πεor2
  • B.
    _q2
    4πεor
  • C.
    _q
    4πεor2
  • D. \(\frac{q}{4πε_or}\)
View Answer & Discuss (7) JAMB 2011
43
An image in a convex lens is upright and magnified 3 times. If the focal length of the lens is 15 cm, what is the object distance?
  • A. 10 cm
  • B. 25 cm
  • C. 16 cm
  • D. 14 cm
View Answer & Discuss (6) JAMB 2011
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44

A length of wire has a frequency of 225Hz when stretched by a force of 225N. If the force increased to 324N, what is the new frequency of vibration?

  • A. 270 Hz
  • B. 512 Hz
  • C. 488 Hz
  • D. 356 Hz
View Answer & Discuss (10) JAMB 2011
45
In the circuit above, three resistors, 2Ω, 4Ω and 12Ω are connected in parallel and a 12V battery is connected across the combination. The current flowing through the 12Ω resistors is
  • A. 14.4 A
  • B. 1.0 A
  • C. 3.2 A
  • D. 9.6 A
View Answer & Discuss (5) JAMB 2011
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