ur solutions of following problems arc due by the end of Friday February 5th cla
ID: 1588204 • Letter: U
Question
ur solutions of following problems arc due by the end of Friday February 5th class. A small metal ball with a mass of m_degree and a charge of q_degree _(q _degree > 0) is located in a region of space with an electric field of E_degree (E_degree > 0) in +x direction. The ball is then released from rest at a distance of 3d above the ground (it will start to fall due to the gravity). What is the velocity of the ball after it has moved a vertical distance of d What is the kinetic energy of the ball when it hits the ground There arc three charges fixed on xy plane. They arc q_1 = 1mC at (0,0) , q_1 =1mC at (0,0), q_2 = -2mC atExplanation / Answer
(6)
Direction of Electric Force on an Electron is -
(b) along the radial direction towards the center of the sphere.
(8)
The Sphere will act as a point charge.
E = K*q/r^2
E = (9.0 * 10^9 * 2.0*10^-8)/0.3^2
E = 2000 N/C
Option (b)
(10)
Q = C*V
2.0 * 10^-6 = C * 50
C = 4.0 * 10^-8
Capacitance, C = 4.0 * 10^-8
Option (b)
(11)
Electrical Energy stored,
E = 1/2*CV^2
E = 1/2 * 4.0 * 10^-8 * 50^2
E = 5.0 * 10^-5 J
Option (b)
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