Electrostatics Quiz-01

1. An electron of mass me , initially at rest, moves through a certain distance in a uniform electric field in time t1 .A proton of mass m,also initially at rest, takes time tto move through an equal distance in this uniform electric field. Neglecting the effect of gravity, the ratio t1 /tis nearly equal to

 
 
 
 

2. Two equal negative charges -q are fixed at points (0,-a) and (0,a) on y-axis. A positive charge Q is released from rest at the point (2a,0) on the x-axis. The charge Q will

 
 
 
 

3. A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal to

 
 
 
 

4. Positive and negative point charges of equal magnitude are kept at (0,0,a/2) and (0,0,-a/2), respectively. The work done by the electric field when another positive point charge in moved from (-a,0,0) to (0,a,0) is

 
 
 
 

5. Two charges, each equal to q, are kept at x=-a and x=a on the x-axis. A particle of mass m and charge q0=q/2 is placed at the origin. If charge q

is given a small displacement y(y<<a) along the y-axis, the net force acting on the particle is proportional to

 
 
 
 

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