Recent content by Aleksandre

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    Electric field vector due to very long thread

    Ok I got it thanks. I was looking to threads from left view and could not see that.
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    Electric field vector due to very long thread

    No. Now I'm really stuck can I get a hint?
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    How charge density of plate is changed by permittivity

    Does not capacitance formula require an area of the plate? C=epsilon*Area/distance
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    Electric field vector due to very long thread

    They have opposite direction and same magnitude so would it be zero?
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    How charge density of plate is changed by permittivity

    Homework Statement Distance between plates of a parallel-plate vacuum capacitor is d. The capacitor is attached to a battery that keeps it at a voltage V. The space between plates is now filled dielectric relative permittivity epsilon. How will charge density of the plates change? Homework...
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    Electric field vector due to very long thread

    Just add them up? so 2*E?
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    How close will body approach fixed point charge?

    Homework Statement Charged sphere with a mass of 15 mg and charge 2 nC moves with a speed of 15 cm/s towards a fixed point charge of 3 nC. How close will sphere approach charge? Homework Equations K=(1/2)*mv2 U=k*(Q1Q2/r) The Attempt at a Solution So I am not sure I approached correctly but...
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    Electric field vector due to very long thread

    Homework Statement Two parallel very long threads are uniformly charged with linear charge density of 10-8 C/cm . Distance between them is 15 cm. Find electric field vector at a distance of 15 cm from both threads. Homework Equations E*dA=Qenclosed/permittivity of free space The Attempt at a...
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    Find the amount of work to move a particle from point A to B

    Thanks for reply, so to reformulate: Area of sphere = 4pir2 =>4*3.14*0.152 Total charge Q would equal to(?) = 0.12C/m2*Area of Sphere Then if sphere centre can be considered as a point charge(?) the Rfinal would be radius of sphere+distance to charge?
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    Find the amount of work to move a particle from point A to B

    Homework Statement How much work should be done on a point charge of q=15 nC to bring it from infinity to a distance of 3 cm from a surface of a charged sphere? Diameter of sphere is 15 cm, its surface charge density is 12 microC/cm2 Homework Equations W=deltaU=q*deltaV v=kQ/r...
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    Point where the electric field is zero

    Homework Statement Charges q1= +3 nC and q2=+8 nC have a separation distance of d= 12 cm. Find the point where the electric field is zero. Homework Equations E=kq/r2 The Attempt at a Solution I approached this problem as follows: 1) I assume the point where it happens is between charges, on...