## anonymous one year ago Two large parallel plates are 2.0 cm apart. The strength of the electric field between them is 100.0 N/C. What is the difference in voltage between the plates?

1. anonymous

-2.0 V , 0 V , +20 V , or +2.0 V

2. anonymous

2.0 * 100 ?

3. Michele_Laino

here we have to apply this vector formula: $\Large {\mathbf{E}} = - {\text{grad}}\varphi$

4. anonymous

ok!

5. Michele_Laino

we have to integrate that formula, so we get: $\Large \Delta \varphi = - Ed$

6. anonymous

ok! so we get -(-20)?

7. Michele_Laino

I got this: $\Large \Delta \varphi = - Ed = - 100 \times 0.02 = ...volts$

8. anonymous

i do not know if i did that right... ;/

9. anonymous

oh so we get -2! so -2.0 V is our solutoin! thanks!!:D

10. Michele_Laino

:)