force acting on the ball
1) tension
2) weight
3) electrostatic force
writing the force equations
T cos = mg -----(1)
T sin = qE -----(2)
tan = qE/mg
E = mg tan / q
= 4*10^-3*9.8*tan 40 / 9*10^-9
= 3.65*10^6 N/C
e A small sphere is suspended from a string in a uniform electric field shown by...
0 A small sphere is suspended from a string in a uniform electric field shown by arrows, making an angle 0=25° with the vertical. If the mass of the sphere is 3 grams and it has a charge of 4 nC, what is the magnitude of the electric field? 3.43 x 106 N/C 3.43 N/C 0.35 N/C 15.8 x 106 N/C O 3.5 x 105 N/C 15.8 N/C
A small sphere is suspended from a string in a uniform electric field shown by arrows, making an angle O=35° with the vertical. If the mass of the sphere is 3 grams and it has a charge of 8 nC, what is the magnitude of the electric field?
A charged sphere is suspended from a string in a uniform electric field directed horizontally. There is an electric force on the sphere to the right and a gravitational force pointing downward. As a result, the sphere hangs at an angle theta from the vertical. Combinations of sphere mass and electric charge are listed in the chart for four cases, all in the same uniform electric field. Rank the angle theta that the string forms with the vertical for these...
A uniform electric field given by E = (2.60ị – 5.55ņ) x 105 N/C permeates a region of space in which a small negatively charged sphere of mass 1.55 g is suspended by a light cord (see figure below). The sphere is found to be in equilibrium when the string makes an angle 0 = 23.0°. (a) What is the charge on the sphere? (Enter the magnitude.) (b) What is the magnitude of the tension in the cord?
A small, 2.00-g plastic ball is suspended by a 21.2-cm-long string in a uniform electric field as shown in the figure below. If the ball is in equilibrium when the string makes a 16.7° angle with the vertical, what is the net charge on the ball? E 1,00 x 10 N/C A m 2.00 g
A small, 2.00-g plastic ball is suspended by a 21.1-cm-long string in a uniform electric field as shown in the figure below. If the ball is in equilibrium when the string makes a 16.3° angle with the vertical, what is the net charge on the ball? E-1.00x103 N/C m=2.00 g
Question 4 (STPM Question): A small positive charged sphere with mass 0.8 g suspended by a light string from the ceiling in an electric field of intensity 900 NC,is shown in the diagram below. 130 In the equilibrium position shown, the string makes an inclined angle of 30° with the vertical line. (a) Label all forces that act on the sphere on the diagram. 3 marks [3 marks] (b) Determine the magnitude of the charge on the sphere.
Two small metallic spheres, each of mass m = 0.198 g, are suspended as pendulums by light strings of length L as shown in the figure below. The spheres are given the same electric charge of 7.4 nC, and they come to equilibrium when each string is at an angle of θ-4.75° with the vertical. How long are the strings? A 35.0-cm-diameter circular loop is rotated in a uniform electric field until the position of maximum electric flux is found....
A charged sphere of mass 2.8 X 104 kg is suspended from a string. An electric force acts horizontally on the sphere so that the string makes an angle of 33° with the vertical when at rest. Find (a) the magnitude of the electric force and (b) the tension in the string.
8) A charge of +2 micro-coulombs is placed in a uniform electric field and electric force acting on the charge is 14.7 Newtons in the +x direction. What is the magnitude of the electric field in x 106 N/C and in what direction is it? Indicate the -x direction, by including a negative sign. 9) A positive charge of 9 micro-coulombs with some mass is placed on a string and placed in a uniform electric field of 4.1 x 106...