A)185 V B)120V ?)483 V D) 250 VEOv 2 The direction of the current I in a metal w

Question

A)185 V B)120V ?)483 V D) 250 VEOv 2 The direction of the current I in a metal wire is the same as the direction of the interna electric field in the wire but it is opposite to the direction the electrons are moving ) true B) false 8) The plates of a parallel plate capacitor have an area of 0,043 m2 The plates are separates 10 mm and have a charge of 3.5 nC. The material between the plates is vaccum with dielectri constant of 1 Find the voltage across the capacitor A)92V B)0.75 V C)023V D)0.00057 V )0000055 v 9) The resistors in the circuit shown each have a resistance of 300 2. What is the equivalent A) 1200 ? B) 600 2 C) 150 2 D) 300 ? th the emf s is closest to 24 A)-28 V B) 28 V C) 68 V D) 72 V E)-72 V 80 20 v

Explanation / Answer

8) C = Aeo / d

= 0.043*8.85*10^-12 / 0.001

= 3.8*10^-10 F

V = Q/C = 3.5*10^-9/3.8*10^-10 = 9.2 V

so option A) 9.2 V is the correct answer

9) Resistors are in parallel so

R(equi) = R1R2/(R1+R2) = 300*300 / (300+300) = 150 ohm

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