Charging by induction method is used to charge a metallic plate with the help of a negatively charged glass rod, then the charge gets generated on the metallic plate will be:

CONCEPT:

Charging by induction:

• If a charged body is brought near an uncharged body, then one side of the neutral body (closer to charged body) becomes oppositely charged while the other side becomes similarly charged.
• In charging by induction the charged body does not touch the uncharged body.
• In charging by induction the charge generates on the uncharged body will be of the opposite nature as the charge on the charged body.

EXPLANATION:

• In charging by induction the charge generates on the uncharged body will be of the opposite nature as the charge on the charged body.
• So when charging by induction method is used to charge a metallic plate with the help of a negatively charged glass rod, the charge gets generated on the metallic plate will be positive. Hence, option 1 is correct.