Class 12 Physics Electric Charge and Field and Electric Potential and Capacitance Test FM 25

 

Class 12 Physics | Electric Charges and Field and Potential and Capacitance Test FM 25

 

Class 12 | IITJEE | A particle with charge e and mass m, moving along the X-axis with a uniform speed u enters a region where a uniform electric field E is acting along the Y-axis. The particle starts to move in a parabola. Its focal length (neglecting any effect of gravity)

 

Class 12 | Physics | Electric Charges and Field Written Test FM 25

 

Class 12 | Electric charge and field | An infinitely long solid cylinder of radius R has a uniform volume charge density. It has a spherical cavity of radius R/2 with its centre on the axis of the cylinder, as shown in the figure. The magnitude of the electric field at the point P, which is at a distance of 2R from the axis of the cylinder, is given by the expression 23ρR/16kɛ0. The value of k is

 

Class 12 | Electric charge and Field | Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that the surface charge density of the concentric spheres are equal, the potential difference V(R) – V(4R) is

 

Class 12 | Electric Charges and Field | There is a uniform electrostatic field in a region. The potential at various points on a small sphere centred at P, in the region, is found to vary between in the limits 589.0 V to 589.8 V. What is the potential at a point on the sphere whose radius vector makes an angle of 60 degree with the direction of the field?