Who named the two charges positive and negative?

Rh positive and Rh negative.

Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammoniumion. An aminoacid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of aminoacid is called

Figs, (a) and (b) show the field lines of a positive and negative point charge respectively. Give the sign of the potential energy difference of a small negative charge between the points .Q and P, A and B.

Figs, (a) and (b) show the field lines of a positive and negative point charge respectively. Does the kinetic energy of a small negative charge increase or decrease in going from B to A ?

Figs, (a) and (b) show the field lines of a positive and negative point charge respectively. Give the sign of the work done by the field in moving a- small positive charge from Q to P.

Figs, (a) and (b) show the field lines of a positive and negative point charge respectively. Give the signs of the ‘potential differences (V_p-V_Q),(V_B-V_A)

Following is the figure of electrochemical cell having the redox reaction. Name the positive and negative terminals.

The difference between Gram positive and negative bacteria is

A capacitor C_1 of capacitance 5muF is charged to a potetntial of 100V and another capacitor C_2 of capacitance 8muF is charged to 50V. The positive and negative plates are mutually connected. The final potential of the combination of the two capacitance will be