Two identical uniform sheet charges with Ps = 100 nc/m2 are located in a free space at Z = ± 2.0 cm the force per unit area does each sheet exert on each other is
1
-5.64 × 103 az N/m2
2
– 5.64 × 10-4 az N/m2
3
-5.64 × 10+4 az N/m2
4
-5.64 × 10-3 az N/m2