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19 Cards in this Set
- Front
- Back
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a repelling force occurs between two charged objects when...
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charges are of like signs
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when a glass rod is rubbed with silk and becomes positively charged...
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electrons are removed from the rod
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if a positively charged glass rod is used to charge a metal bar by induction...
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the charge on the bar must be negative
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which sentence best characterizes electric conductors?
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they have electric charges that move freely
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when a charged body is brought close to an uncharged body without touching it, a(n) __ charge may result on the uncharged body. when a charged body is brought into contact with an uncharged body and then is removed, a(n) __ charge may result on the uncharged body.
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induced; residual
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if two point charges are separated by 1.5cm and have charge values of 2.0μC and -4.0μC, respectively, what is the value of the mutual force between them?
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320N
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an alpha particle (charge 2C) is sent at high speed toward a gold nucleus (charge 79C). what is the electric force acting on the alpha particle when it is 2.0*10^-24m away from the gold nucleus?
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91N
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four charges A, B, C, D are at corners of a square. Charges A and D, on opposite corners, have equal charge, whereas both B and C have a charge of 1.0C. if the force on B is zero, what is the charge on A?
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-0.35C
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two charges are located on the positive x-axis of a coordinate system. charge q1=2.00*10^-9C, and it is 0.02m from the origin. charge q2=-3.00*10^-9C, and it is 0.04m from the origin. what is the electric force exerted by these two charges on a third charge, q3=5.00*10^-9C, located at the origin?
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1.4*10^-4N
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two point charges have a value of 30mC each and are 4cm apart. what is the electric field at the midpoint between the two charges? (k=8.99*10^9Nm^2/C^2)
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0 N/C
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charges of 4.0mC and -6.0mC are place at two corners of an equilateral triangle with sides of 0.10m. at the third corner, what is the electric field magnitude created by these two charges?
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1.6*10^6 N/C
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at what point is the electric field of an isolated, uniformly charged, hollow metallic sphere greatest?
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the sphere's outer surface
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if a conductor is in electrostatic equilibrium, the electric field inside the conductor is...
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zero
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if an irregularly-shaped conductor is in electrostatic equilibrium, charge accumulates...
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where the radius of curvature is smallest
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which of the following is not a characteristic of electrical potential energy?
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it results from a single chatrge
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two positive charges are initially separated by a distance of 2cm. if their separation is increased to 6cm, the resultant electrical potential energy is equal to what factor times the initial electrical potential energy?
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1/3
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a proton moves 10.0cm on a path parallel to the direction of a uniform electric field of strength 2.0 N/C. what is the electrical potential energy between the two charges?
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-4.8*10^-20
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two protons are 2.0*10^-5m apart. what is the electrical potential energy between the two charges?
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1.1*10^-23J
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four point charges are positioned on the circumference of a circle with a radius of 10cm. the charges are 0.5μC, 1.5μC, -1.0μC and -0.5μC respectively. if the electric potential at the center of the circle due to the 0.5 charges alone is 4.5*10^4V, what is the total potential at the center due to the four charges combined?
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4.5*10^4V
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