Numerical Problems of Electrostatics Class-12 Chapter-1

Numerical Problems of Electrostatics Class-12 Chapter-1

1. Three charges 4q, Q and q are in a straight line in the position of 0, l/2 and l respectively. The resultant force on q will be zero, if Q = 

(a) -q           (b) -2q           (c) -q/2        (d) 4q

2. Dielectric constant of pure water is 81. Its permittivity will be 

(a) 7.12 *  10-10     MKS units                 (b) 8.86 *  10-12     MKS units 

 (c) 1.02 *  1013     MKS units                 (d) Cannot be calculated

3. When 1014  electrons are removed from a neutral metal sphere, the charge on the sphere becomes 

(a) 16 μC     (b) -16 μC       (c) 32 μC        (d) -32 μC

4. The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01m, then the force between them will become 

(a) 7.20 N       (b) 11.25 N       (c) 22.50 N         (d) 45.00 N

5. Two point charges +3 μC and +8 μC repel each other with a force of 40 N. If a charge of -5 μC is added to each of them, then the force between them will become  

(a) -10 N        (b) +10 N        (c) +20 N         (d) -20 N 

Everyday, i will add 5 numericals to this list.