Question

51 БАЛЛ СРОЧНО! Між двома зарядженими горизонтальними пластинами нерухомо "висить" заряджена крапля води. Позначте 2 правильні твердження: А:Крапля заряджена позитивно Б:У більш сильному електричному полі крапля рухалася б вгору В:У більш сильному електричному полі крапля рухалася б униз Г:Крапля заряджена негативно

Answer 1

Варіант Г:Крапля заряжена негативно и Б:У більш сильному електричному полі крапля рухалася б вгору

Answer 2

The correct statements are:

A: The water droplet is positively charged. B: The water droplet would move upwards in a stronger electric field.

To explain why these statements are correct, let's consider the situation with the charged horizontal plates and the water droplet hanging between them.

When a water droplet is suspended between two charged plates, it becomes polarized. The positive charges in the water molecule are attracted to the negatively charged plate, while the negative charges are attracted to the positively charged plate. This creates an electric field within the droplet.

Since the water droplet is positively charged, statement A is correct. The positive charges within the droplet are attracted to the negatively charged plate, causing the droplet to be suspended in the electric field.

Now, let's consider statement B. In a stronger electric field, the force on the charged droplet would be greater. According to the principle of electrostatics, the force experienced by a charged object in an electric field is given by the equation F = qE, where F is the force, q is the charge, and E is the electric field strength.

Since the water droplet is positively charged, it experiences a force in the direction of the electric field. Therefore, in a stronger electric field, the force on the droplet would be greater, causing it to move upwards. Hence, statement B is correct.

Statement C, which suggests that the water droplet is negatively charged, is incorrect. The water droplet becomes positively charged due to the polarization effect described earlier.

Statement D, which suggests that the water droplet would move downwards in a stronger electric field, is also incorrect. As mentioned earlier, the positively charged droplet would move in the direction of the electric field, which is upwards.

To summarize: - Statement A is correct: The water droplet is positively charged. - Statement B is correct: In a stronger electric field, the water droplet would move upwards. - Statement C is incorrect: The water droplet is not negatively charged. - Statement D is incorrect: The water droplet would not move downwards in a stronger electric field.

Please let me know if there's anything else I can help you with!