- #1
delsoo
- 97
- 0
Homework Statement
hi, all, can anyone explain why the ans is C for this question?
http://i.imgur.com/yGyu5G3.jpg
for the second question? shoudnt the ans is D ?
http://i.imgur.com/R4Gvjoz.jpg
rude man said:For first question:
E = -grad V = -∂V/∂x i
where i is unit vector in direction of P→Q.
So now do you think C is correct? Why or why not?
For second question : I agree with you!
An electric field is a physical quantity that describes the force experienced by a charged particle in an electric field. It is defined as the force per unit charge at a given point in space.
Electric field is a vector quantity that describes the force experienced by a charged particle, while electric potential is a scalar quantity that describes the potential energy of a charged particle at a given point in space. In other words, electric field tells us the direction and magnitude of the force, while electric potential tells us the potential energy associated with that force.
The electric field at a point is equal to the negative gradient of the electric potential at that point. In other words, the electric field is the rate of change of electric potential with respect to position.
In a uniform electric field, the electric field is constant and has the same magnitude and direction at all points. The electric potential, on the other hand, decreases linearly with distance from the source of the field. This means that the electric potential is proportional to the distance from the source, while the electric field remains constant.
Electric field is measured in units of force per unit charge, such as newtons per coulomb. Electric potential is measured in units of energy per unit charge, such as volts. Both quantities can be measured using specialized instruments, such as an electric field meter or a voltmeter.