Would a positive test charge released from rest move toward a region of higher o

Question

Would a positive test charge released from rest move toward a region of higher or lower electric potential (as compared to the electric potential at the point where it was released?) 2. 3. Would a negative test charge released from rest move toward a region of higher or lower electric potential (as compared to the electric potential at the point where it was released?) 4. What is the direction of the electric field at the dot in the figure below? What is the magnitude of the electric field at the dot? 400v 1 cm 200 V 1 cn 5. What are the magnitude and direction of the electric field at the dot in the figure below? 1 em 200 V 45T o V -200 v

Explanation / Answer

2) lower electri potential.

Because, The direction of electric field always points from higher potential to lower elctric potentia.

And we know, the direction of force on a test charge is in the direction of elctric field.

3) higher elctric potential.

Because, The direction of electric field always points from higher potential to lower elctric potentia.

And we know, the direction of force on a negative charge is always opposite to the direction of elctric field.

4) downward

E = delta_V/d

= (400 - 200)/(1*10^-2)

= 20000 N/c

5) E = delta_V/d

= (200 - 0)/(1*10^-2)

= 20000 N/c

direction : 45 degrees below -x axis

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