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
216 drops are joined together to form a bigger drop. If each small drop has a capacitance C, a potential V, and a charge q, then the capacitance of the bigger drop will be
(A) 18C
(B) 12C
(C) 6C
(D) 36C
Option c – 6C
Point A is at potential +500 V and B is at potential – 500 V. The work done by an external agent to take a unit positive charge from A to B is
(A) + 1000 J
(B) – 1000 J
(C) +500 J
(D) – 500 J
Option b – – 1000 J
The difference in the effective capacitance of two equal capacitors when joined in parallel and series is 6 µF. The value of each capacitor is
(A) 1 µF
(B) 2 µF
(C) 3 µF
(D) 4 µF
Option d – 4 µF
Point charges + 4q, -q, and + 4q are kept on the X-axis at points x = 0, x = a, and x = 2a respectively.
(A) Only-q 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 metal plate P is inserted halfway between the plates of a parallel plate capacitor of capacitance 15 µF in such a way that it is parallel to the two plates. The capacitance now becomes
(A) 7.5 µF
(B) 15 µF
(C) 30 µF
(D) None of these
Option b – 15 µF
Two positive point charges of 12 µC and 8 µC are 16 cm apart. The work done in bringing them 12 cm closer is
(A) 5.4 J
(B) 8.4 eV
(C) 16.2 J
(D) 16.2 eV
Option c – 16.2 J
A capacitor is kept connected to the battery and a dielectric slab is inserted between the plates. During this process
(A) no work is done.
(B) work is done at the cost of the energy already stored in the capacitor before the slab is inserted.
(C) work is done at the cost of the battery.
(D) work is done at the cost of both the capacitor and the battery.
Option c – work is done at the cost of the battery.
The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
(A) 7.5 N
(B) 11.25 N
(C) 35.00 N
(D) 48.00 N
Option b – 11.25 N
An infinite number of charges, each of charge 8 µC, are placed on the X-axis with coordinates x = 1, 3, 9, 27, ….. If a charge of 1 C is kept at the origin, then the net force acting on the 1 C charge is
(A) 9000 N
(B) 27000 N
(C) 81000 N
(D) 36000 N
Option c – 81000 N
Two capacitors C₁ and C₂ are charged to 240 V and 180 V respectively. It is found that by connecting them together the potential of each one can be made zero. Then
(A) 5C₁ = 3C₂
(B) 5C₁ +6C₂ = 0
(C) 4C₁-3C₂=0
(D) 9C₁ = 4C₂
Option c – 4C₁-3C₂ = 0
The potentials of two plates of capacitors are +20 V and -20 V and the charge on one of the plates is 20 C. The capacitance of the capacitor is
(A) 2 F
(B) 4F
(C) 0.5 F
(D) 0.25 F
Option c – 0.5 F
If a unit positive charge is taken from one point to another over an equipotential surface, then
(A) work is done on the charge.
(B) work is done by the charge.
(C) work done is constant.
(D) no work is done.
Option d – no work is done
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