Physics
Thermodynamic
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#121 If the charge on a capacitor is doubled, the energy stored becomes
A) Half
B) Double
C) One-fourth
D) Four times
#122 If the voltage across a capacitor is doubled, the energy stored becomes
A) Half
B) Double
C) One-fourth
D) Four times
#123 The dielectric constant of a medium is
A) \( \frac{C}{C_0} \)
B) \( \frac{C_0}{C} \)
C) \( \epsilon / \epsilon_0 \)
D) Both A and C
#124 The dielectric constant of vacuum is
A) 1
B) 0
C) 8
D) -1
#125 The dielectric constant of air is approximately
A) 1
B) 1.0006
C) 2
D) 3
#126 The dielectric constant of water is about
A) 80
B) 60
C) 40
D) 20
#127 The dielectric constant of mica is about
A) 3
B) 5
C) 7
D) 9
#128 Gauss’s law states that the electric flux through a closed surface is equal to
A) \( \frac{1}{\epsilon_0} \) times the charge enclosed
B) \( \epsilon_0 \) times the charge enclosed
C) \( \frac{1}{\epsilon_0} \) times the total charge
D) \( \epsilon_0 \) times the total charge
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