The flux of electric field intensity E through a closed surface is equal to zero, which means in the surface
A: there are more positive charges than negative charges.
B: there are more negative charges than positive charges.
C: there are the same quantity of the positive charges and negative charges.
D: there is no polarized chargeharge.
A: there are more positive charges than negative charges.
B: there are more negative charges than positive charges.
C: there are the same quantity of the positive charges and negative charges.
D: there is no polarized chargeharge.
举一反三
- About the oxide charges, which statement is NOT true. A: Positive oxide charges decrease [img=18x22]1802daf62ab2a5d.png[/img]. B: Positive oxide charges decrease [img=18x22]1802daf62ab2a5d.png[/img]. C: Positive oxide charges make C-V curve shift toward negative voltage. D: The C-V curve shift is larger as the charges located near the substrate.
- Researchers found that it tended to be more _____ by analyzing word-of-mouth communication. A: negative than positive B: positive than negative
- 1. Charges of 3.00 nC, –2.00 nC, –7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, width 2.00 m, and height 2.50 m. Outside the box are charges of 1.00 nC and 4.00 nC. What is the electric flux through the surface of the box?
- If a firm charges more than the market price, it loses all its customers to other firms.
- Negative events are more likely than positive events to be reported by the media.