Cracking the SAT Physics Subject Test

(Marvins-Underground-K-12) #1

  1. How much work is done by the electric field created by the
    stationary charge +Q = +2.0 C to move a charge of +1.0 × 10−9 C
    from position X to position Z? (Note: The value of Coulomb’s
    constant, k, is 9 × 10^9 N×m^2 /C^2 .)
    (A) 0 J
    (B) 150 J
    (C) 300 J
    (D) 560 J
    (E) 1,000 J

  2. If EY is the electric field strength at position Y and EZ is the electric


field strength at position Z, what is the value of?


(A)

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