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Physical World MCQ for NEET. We covered all the Physical World MCQ for NEET in this post for free so that you can practice well for the exam.
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MCQ on Physical World for NEET Students
When 216 identical droplets merge into a single larger droplet, and each small droplet has capacitance C, what is the capacitance of the new large droplet?
(A) 18C
(B) 12C
(C) 6C
(D) 36C
Option c – 6C
If point A has a potential of +500 V and point B has a potential of -500 V, how much work must an external agent do to move a unit positive charge from A to B?
(A) +1000 J
(B) -1000 J
(C) +500 J
(D) -500 J
Option b – -1000 J
The effective capacitance difference between parallel and series connections of two identical capacitors is 6 µF. What is the value of each capacitor?
(A) 1 µF
(B) 2 µF
(C) 3 µF
(D) 4 µF
Option d – 4 µF
Charges +4q, -q, and +4q are placed at x = 0, x = a, and x = 2a respectively on the X-axis. What can be said about their equilibrium?
(A) Only the -q charge is in stable equilibrium
(B) None of the charges are in equilibrium
(C) All the charges are in unstable equilibrium
(D) All the charges are in stable equilibrium
Option c – All the charges are in unstable equilibrium
A thin conducting plate is inserted halfway between the plates of a parallel plate capacitor (capacitance 15 µF), aligned parallel to the plates. What is the resulting capacitance?
(A) 7.5 µF
(B) 15 µF
(C) 30 µF
(D) None of these
Option b – 15 µF
Two positive charges of 12 µC and 8 µC are separated by 16 cm. What is the work done in reducing their separation by 12 cm?
(A) 5.4 J
(B) 8.4 eV
(C) 16.2 J
(D) 16.2 eV
Option c – 16.2 J
A capacitor remains connected to a battery while a dielectric slab is inserted between its plates. What happens during this process?
(A) No work is performed
(B) Energy stored in the capacitor is used to perform work
(C) Battery supplies the energy required for work
(D) Both the battery and capacitor provide energy for work
Two point charges are 0.06 m apart and experience a force of 5 N. If they are moved closer by 0.01 m, what is the new force between them?
(A) 7.5 N
(B) 11.25 N
(C) 35.00 N
(D) 48.00 N
Option b – 11.25 N
Identical charges of 8 µC are placed on the x-axis at positions x = 1, 3, 9, 27, and so on. A 1 C charge is located at the origin. What is the net force on the 1 C charge?
(A) 9000 N
(B) 27000 N
(C) 81000 N
(D) 36000 N
Option c – 81000 N
Capacitors C₁ and C₂ are initially charged to 240 V and 180 V, respectively. Connecting them in a certain way makes the potential of each zero. What is the relationship between them?
(A) 5C₁ = 3C₂
(B) 5C₁ + 6C₂ = 0
(C) 4C₁ − 3C₂ = 0
(D) 9C₁ = 4C₂
Option c – 4C₁ − 3C₂ = 0
The potential difference between the plates of a capacitor is 40 V, and one of the plates carries a charge of 20 C. What is the value of the capacitor?
(A) 2 F
(B) 4 F
(C) 0.5 F
(D) 0.25 F
Option c – 0.5 F
When a unit positive charge moves along an equipotential surface from one point to another, what is the work done?
(A) Work is done on the charge
(B) Work is done by the charge
(C) Work done remains constant
(D) No work is done
Option d – No work is done
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