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What is electric field due toinfinite wire of lambda charge density


Alpha particles are made of two protons and two neutrons.

mp=1.673x10^-27  kg;mn =1.675x10^-27 kg;qe =1.60x10^-19C


-Find the electric force acting on an alpha particle in a vertical electric field of 7.00 x 10^2 N/C.


-What is the acceleration of this alpha particle?



A -2.00 microC point charge of mass 8.00 g is suspended on a string and placed in a horizontal electric field. The mass is in equilibrium when the string forms a 45 angle with the vertical.


  1. Find the electric force on the charge in this field

2.Find the strength of the electric field.

3.How many electrons are there in 10.00 C? How many electrons are there in

15.00 microC?


A charge is released from rest in a

uniform electric field with a magnitude of 4.5 × 10^3 V/m. The charge moves 350 cm as aresult. What is the potential difference between the charge’s initial and final positions?


A capacitor has a capacitance of 4.50 μF. What charge would be stored if the potential difference is 6V?



A charge is released from rest in a

uniform electric field with a magnitude of 4.5 × 103 V/m. The charge moves 350 cm as aresult. What is the potential difference between the charge’s initial and final positions?


Three charged particles are placed so that each particle is at the corner of a triangle that lies in the x-plane. The charge at the origin is –3.0 μC, the charge at = 6.0 cm on the x-axis is+4.0 μC, and the charge at = 4.0 cm on the y-axis is +2.5 μC. What is the net electric force on the –3.0 μC charge?



In 1955, a water bore that was 2231 m deep was drilled in Montana. Consider two

charges, q2 = 5.60 mC and q1, separated by a distance equal to the depth of the well. If

a third charge, q3 = 1.998 C, is placed 888 m from q2 and is between q2 and q1, this

third charge will be in equilibrium. What is the value of q1?


A charge is released from rest in a

uniform electric field with a magnitude of 4.5 × 10^3 V/m. The charge moves 350 cm as a

result. What is the potential difference between the charge’s initial and final positions?


Producing an electric spark in a factory furnace requires an electric field of 9.5 × 106 V/m. The

gap between electrodes in the ignition device is 8.5 mm. What minimum potential difference

must be supplied by the ignition device to start the furnace?


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