Question

Figure 1.30 shows tracks of three charged particles in a uniform electrostatic field. Give the signs of the three charges. Which particle has the highest charge to mass ratio?

The position of the point where net electric field will be zero - 4Q –Q ←——— a ————→

A thundercloud carries a charge of +50 C at a height of 4000 m and a charge of -50 C at a height of 2000 m from the ground. An airplane crosses through the charged thundercloud at a height of 3000 m from the ground. Find the magnitude and the direction of the electric field acting on the airplane as its crosses through the charged-up thundercloud.

(a) Given is a line of charge of uniform linear density. A charge +q is distributed uniformly between y = 0 and y = a and charge -q is distributed uniformly between y = 0 and y = -a. Explain how the direction of the resultant electric field at point P can be obtained. Represent using a vector diagram. (b) Two point charges 4Q, Q are separated by 1 m in air. At what point on the line joining the charges is the electric field intensity zero?