Related InterviewSolutions

• Two semicircle wires ABC, and ADC, each of radius R are lying on xy and xz planes, respectively as shown in fig. if the linear charge density of the semicircle parts and straight parts and straight parts is `lambda`, Find the electric field entensity `vec(E)` at the origin .
• Two identical conduction spheres, one having an initial charge +Q and the other initially uncharged, are brought into contact. (a) What is the new charge on each sphere? (b) While the spheres are in contact, a positively chaged rod is moved close to one sphere, causing a redistribution of hte charges on the two spheres so the charge on hte sphere closest to the rod has a charge-Q. What is the charge to the other sphere?
• A charged rod attracts bits of dry paper, which after touching the rod often jucp away from it rapidly, Expalin
• A person standing on an ainsulating stool touches a charged insulatd conductor. Will the conductor get completely discharged?
• Two negative charges of a unit magnitude and a positive charge q are placed along a straight line. At what position and value of q will the system be in equilibrium? (Negative charges are fixed).
• When an electron moves in a circular path around a stationay nucles charge at the centerA. the acceleration of the electron changesB. the velocity of the electon changeC. electric field due to the nucleus at the electron changesD. none of these
• Figure shows the tracks of three charged particles in a unform electrostatic field projected parallel to a plate with the same velocity. Give the signs of the three charges. Which of the three charges. Which of the three particles has the highest charge-to-mass ratio?
• Two small identical balls lying on a horizontal plane are connected by a weightless spring. One ball (ball 2) is fixed at O, and the other (ball 1) is free. The balls are charged identically as a result of which the spring length increases `eta=2` times. Determine the change in frequency.
• Apolythene piece rubbed will wool is found to have a negative charge of `3.0xx10^(-7)C`. (a) Estimate the number of electrons transferred (from which to which )? (b) Is there a transfer of mass from wool to polythene?
• Two small identical conducting balls A and B of charges `+10 mu C` and `+30 mu C` respectively, are kept at a separation of 50 cm. these balls have been connected by a wire for a short time The final charge on each of the balls A and B and force of interaction will beA. `28.8N`B. `32.6N`C. `14.4N`D. `72N`