Thermodynamic — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#129 The electric flux through a closed surface is zero if
A) No charge is enclosed
B) The net charge enclosed is zero
C) Both A and B
D) Neither A nor B
#130 The electric field due to an infinite plane sheet of charge is
A) \( \sigma / 2 \epsilon_0 \)
B) \( \sigma / \epsilon_0 \)
C) \( 2 \sigma / \epsilon_0 \)
D) \( \sigma / 4 \epsilon_0 \)
#131 The electric field due to an infinite line charge is
A) \( \lambda / 2 \pi \epsilon_0 r \)
B) \( \lambda / 4 \pi \epsilon_0 r \)
C) \( 2 \lambda / \pi \epsilon_0 r \)
D) \( \lambda \pi \epsilon_0 r \)
#132 The electric field inside a conductor is
A) Zero
B) Constant
C) Proportional to distance
D) Inversely proportional to distance
#133 The electric potential inside a conductor is
A) Zero
B) Constant
C) Proportional to distance
D) Inversely proportional to distance
#134 The charge on a conductor resides
A) Inside the conductor
B) On the surface
C) Both inside and on the surface
D) Neither inside nor on the surface
#135 The electric field at the surface of a conductor is
A) Zero
B) \( \sigma / \epsilon_0 \)
C) \( 2 \sigma / \epsilon_0 \)
D) \( \sigma / 4 \epsilon_0 \)
#136 The capacitance of a spherical capacitor is
A) \( 4 \pi \epsilon_0 a b / (b - a) \)
B) \( 4 \pi \epsilon_0 (b - a) \)
C) \( 4 \pi \epsilon_0 / (b - a) \)
D) \( 4 \pi \epsilon_0 a / (b - a) \)
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