Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Kinetic energy of an electron accelerated in a potential difference of 100 V is
By using KE = QV ⇒ KE = 1.6 × 10–19 × 100
= 1.6 × 10–17 J
If identical charges (–q) are placed at each corner of a cube of side b, then electric potential energy of charge (+q) which is placed at centre of the cube will be -
Length of the diagonal of a cube having each side b is So distance of centre of cube from each vertex is
Hence potential energy of the given system of charge is
A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 kV, its kinetic energy will be -
KE = QV = e × 103 V = 1KeV.
A thin spherical conducting shell of radius R has a charge q. Another charge Q is placed at the centre of the shell. The electrostatic potential at a point p a distance from the centre of the shell is
For a conducting spherical shell, the electric field and potential inside the shell are due solely to the charge Q at the center. Outside the shell, the potential is the sum of the potentials due to Q and the charge q on the shell. At a distance R/2 from the center, the potential contributions from Q and q add up to give the given expression.
A force F acts between two charges +Q and -Q that is placed at a certain distance from each other. The third sphere of charge Q is placed between them. What is the magnitude and force experienced by the third charge?
A sphere of 4 cm radius is suspended within a hollow sphere of 6 cm radius. The inner sphere is charged to potential 3 e.s.u. and the outer sphere is earthed. The charge on the inner sphere is
In nature,the electric charge of any system is always equal to:
In nature, electric charges are always found in integral multiples of the fundamental unit of charge, known as the elementary charge (e ≈ 1.602 × 10^-19 C). This is because electric charge is quantized, meaning it can only exist in discrete amounts. Hence, the electric charge of any system is an integral multiple of the least amount of charge.
Four charges are placed at the corners of a square taken in order. At the centre of the square
Point charge q1 = 2 μC and q2 = –1 μC are kept at points x = 0 and x = 6 respectively. Electrical potential will be zero at points
Equipotential surfaces associated with an electric field which is increasing in magnitude along the x-direction are
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.