Topic: Unit I: Electrostatics (Test 2)



Topic: Unit I: Electrostatics
Q.1
Two points A and B are maintained at a potential of 7 V and -4 V respectively. The work done in moving 50 electrons from A to B is
A. 8.80 × 10-17 J
B. -8.80 × 10-17 J
C. 4.40 × 10-17 J
D. 5.80 × 10-17 J
Answer : Option A
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Q.2
If voltage applied on a capacitor is increased from V to 2V, choose the correct conclusion.
A. Q remains the same, C is doubled
B. Q is doubled, C doubled
C. C remains same, Q doubled
D. Both Q and C remain same
Answer : Option C
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Q.3
A parallel plate capacitor stores a charge Q at a voltage V. Suppose the area of the parallel plate capacitor and the distance between the plates are each doubled then which is the quantity that will change?
A. Capacitance
B. Charge
C. Voltage
D. Energy density
Answer : Option D
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Q.4
Three capacitors are connected in triangle as shown in the figure. The equivalent capacitance between the points A and C is


A. 1µF
B. 2 µF
C. 3 µF
D. 1/4µF
Answer : Option B
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Q.5
Two metallic spheres of radii 1 cm and 3 cm are given charges of -1 x 10-2 C and 5 x 10-2 C respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is
A. 3 × 10-2 C
B. 4 × 10-2 C
C. 1 × 10-2 C
D. 2 × 10-2 C
Answer : Option A
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