physics The diagram shows two identical particles, each with positive Q. The ele

Question

physics The diagram shows two identical particles, each with positive Q. The electric field at point P on the perpendicular bisector of the line joining them is The area vector for a flat surface is area of the surface and has a magnitude equal to the area of the surface. A conducting sphere has charge Q and its electric potential is V, relative to the potential far away. If the charge is doubled to 2Q, the potential is Write the symbol and unit for: If is the current density and dA is a vector element of area then the integral integral over an area represents the through the area. A certain capacitor, in series with resistor and is being charged. At the end of 0.01s its charge is half the final value. The time constant is seconds. {Use : q = q_max (1 - e^-t/pi).} An electrical insulator is a material through which do not flow easily.

Explanation / Answer

1) towards +x axis

2) normal

3) 2*V

4) F, Farad

5) Current

6) q = Qmax*(1 - e^(-t/T)

0.5*Qmax = Qmax*(1 - e^(-t/T))

0.5 = 1 - e^(-t/T)

e^(-t/T) = 1 - 0.5

-t/T = ln(0.5)

T = -t/ln(0.5)

= -0.01/ln(0.5)

= 0.0144 s

7) current

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