Electric Field & Field Lines: JEE Questions & Solutions

A simple pendulum has a bob with mass m and charge q. The pendulum string has negligible mass. When a uniform and horizontal electric field…

Six point charges are kept 60^ apart from each other on the circumference of a circle of radius R as shown in figure. The net electric…

An electron is made to enters symmetrically between two parallel and equally but oppositely charged metal plates, each of 10 cm length. The…

An electron of mass m with an initial velocity v = v0 i (v0 0) enters an electric field E = -E0 k. If the initial de Broglie wavelength is…

Consider two infinitely large plane parallel conducting plates as shown below. The plates are uniformly charged with a surface charge…

A point charge +q is placed at the origin. A second point charge +9q is placed at (d, 0, 0) in Cartesian coordinate system. The point in…

Consider a circular loop that is uniformly charged and has a radius 2. Find the position along the positive z-axis of the cartesian…

A metallic ring is uniformly charged as shown in the figure. AC and BD are two mutually perpendicular diameters. Electric field due to arc…

The electric field in a region is given by E = (2 i + 4 j + 6 k) 10^3 N/C. The flux of the field through a rectangular surface parallel to…

Electric charge is transferred to an irregular metallic disk as shown in the figure. If 1, 2, 3, and 4 are charge densities at given…

A thin metallic wire having cross-sectional area of 10^-4 m^2 is used to make a ring of radius 30 cm. A positive charge of 2 C is uniformly…

A particle of charge -q and mass m moves in a circle of radius r around an infinitely long line of charge having linear charge density +.…

Two charges q and 3q are separated by a distance r in air. At a distance x from charge q, the resultant electric field is zero. The value…

An electric field is given by E = (6 i + 5 j + 3 k) N/C. The electric flux through a surface area 30 i m^2 lying in the YZ-plane (in SI…

A stream of positively charged particles having q/m = 2 10^11 C/kg and velocity v0 = 3 10^7 m/s is deflected by an electric field E = 1.8 j…

A uniform electric field of 10 N/C is created between two parallel charged plates (as shown in figure). An electron enters the field…

A point charge of 10 C is placed at the origin. At what location on the X-axis should a point charge of 40 C be placed so that the net…

Two equal positive point charges are separated by a distance 2a. The distance of a point from the centre of the line joining two charges on…

An electron revolves around an infinite cylindrical wire having uniform linear charge density 2 10^-8 C/m^-1 in a circular path under the…