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A uniform electric field with a magnitude of 6500 N/C points in the positive x direction. a) Find the change in electric potential energy when a +12.5-μC charge is moved 6.00 cm in the positive x direction. (J)
b) Find the change in electric potential energy when a +12.5-μC charge is moved 6.00 cm in the negative x direction. (J)
c) Find the change in electric potential energy when a +12.5-μC charge is moved 6.00 cm in the positive y direction. (J)

Respuesta :

Explanation:

Given that,

Electric field = 6500 N/C

Charge [tex]q=+12.5\ \mu C[/tex]

Distance = 6.00 cm

(a). When a charge is moved in the positive x direction

We need to calculate the electric potential energy

Using formula of potential energy

[tex]\Delta U=-W[/tex]

[tex]\Delta U=-F\cdot d[/tex]

[tex]\Delta U=q(E\cdot d)[/tex]

Put the value into the formula

[tex]\Delta U=-12.5\times10^{-6}\times6500\times6.00\times10^{-2}[/tex]

[tex]\Delta U=-4.88\times10^{-3}\ J[/tex]

The change in electric potential energy is [tex]-4.88\times10^{-3}\ J[/tex].

(b). When a charge is moved in the negative x direction

We need to calculate the electric potential energy

Using formula of potential energy

[tex]\Delta U=q(E\cdot d)[/tex]

Put the value into the formula

[tex]\Delta U=12.5\times10^{-6}\times6500\times6.00\times10^{-2}[/tex]

[tex]\Delta U=4.88\times10^{-3}\ J[/tex]

The change in electric potential energy is [tex]4.88\times10^{-3}\ J[/tex].

(c). When a charge is moved in the positive y direction

We need to calculate the electric potential energy

Using formula of potential energy

[tex]\Delta U=q(E\cdot d)[/tex]

[tex]\Delta U=0[/tex]

Because the electric field direction is perpendicular to the movement.

So, The change in electric potential energy is zero.

Hence, This is the required solution.