Two point charges +4q and +q are placed 30cm apart. At what point on the line joining them is the electric field zero

Two point charges +4q and +q are placed 30 cm apart. At what point on the line joining them the electric field is zero ?

Two point charges of +3mu C each are 1m apart. At what point on the line joining the charges, the electric field intensity be zero?

Two point charges 4Q, Q are separated by 1m in air. At what point on the line joining the charges is the electric field intensity zero ? Also calculate the electrostatic potential energy of the system of charges, taking the value of charge, Q=2xx10^(-7)C .

Two point charges 4Q, Q are separated by 1m in air. At what point on the line joining the charges is the electric field intensity zero ? Also calculate the electrostatic potential energy of the system of charges, taking the value of charge, Q=2xx10^(-7)C .

Two point charge - 5 mu C and + 3 mu C are placed 64 cm apart. At what points on the line joining the two charges is the electric potential zero. Assume the potential at infinity to be zero.

Two point charges - 5 mu C and + 3 muC are placed 64 cm apart . At what points on the line joining the two charges is the electric potential zero ? (Assume the potential at infinity to be zero) .

Two point charge - 5 mu C and + 3 mu C are placed 64 cm apart. At what points on the line joining the two charges is the electric potential zero. Assume the potential at infinity to be zero.