O-LevelPhysicsElectricity5054/12 · Oct/Nov 2021 · Q311 Mark
A positively charged plastic rod is held near but not touching an insulated and previously uncharged metal ball. No charge leaves the rod. What are possible charges on the left-hand side and right-hand side of the ball?
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Acharge on left-hand side of ball: -2.0 × 10⁻⁹ A, charge on right-hand side of ball: -1.0 × 10⁻⁹ A
Bcharge on left-hand side of ball: -2.0 × 10⁻⁹ A, charge on right-hand side of ball: +2.0 × 10⁻⁹ A
Ccharge on left-hand side of ball: -2.0 × 10⁻⁹ C, charge on right-hand side of ball: +2.0 × 10⁻⁹ C
Dcharge on left-hand side of ball: +2.0 × 10⁻⁹ C, charge on right-hand side of ball: -2.0 × 10⁻⁹ C
✓ Correct answer
C: charge on left-hand side of ball: -2.0 × 10⁻⁹ C, charge on right-hand side of ball: +2.0 × 10⁻⁹ C
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