HSC (New South Wales) Static Electricity — practice questions
59 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice HSC (New South Wales) Static Electricity in the app →A small sphere carrying a positive charge is held near a second small sphere carrying a negative charge. What The SI unit of electric charge, the coulomb, is named after which scientist?A proton and an electron are compared for the amount of charge each one carries. How do their charges compare?A dust particle in the Millikan-style setup builds up a static charge of exactly three fundamental units. GiveCopper, silver, and aluminum let charge move through them easily, while plastics, glass, ceramics, and wood doSilicon can be made to conduct or to insulate depending on temperature, purity, and applied force, which is whTwo identical metal spheres are touched together and then separated. Which method of charging does simple contA charged glass rod is brought close to two touching neutral metal spheres but does not touch them. The sphereYou walk across a carpet on a dry day and then touch a metal doorknob, feeling a small spark. Just before you Two spheres start with charges of +4 C and +8 C. They interact, and afterward the blue sphere carries +10 C. UTwo identical conducting spheres carry net charges of +5.0q and -8.0q. The spheres are brought together so theElectrically neutral ink droplets pass through an electron gun in an ink-jet printer and capture some electronA dust particle picks up a net charge of -13 nC. Using the elementary charge e = 1.602 x 10^-19 C, about how mA metal sphere carrying 100 excess electrons is touched to an identical metal sphere carrying 50 excess electrIn how many distinct named ways can an object be given an electric charge?Charles Augustin de Coulomb found that doubling the distance between two charged spheres cut the force betweenIn Coulomb's law, F = k q1 q2 / r^2, what is the value of Coulomb's constant k in SI units?Two point charges q1 and q2 exert a force F on each other. If the value of q1 is doubled while q2 and the sepaTwo charges repel each other with a force of 2.0 N. If the distance between them is tripled while the charges Coulomb measures a repulsive force of 20 x 10^-6 N between two charged spheres separated by 5.0 cm. He then brA charge of -4 x 10^-9 C sits 3.0 cm from a charge of +3 x 10^-9 C. What is the magnitude and direction of theTwo plastic spheres carry equal charge and repel each other with a force of 10 N. All the charge is then removAn engineer measures a repulsive force of 5.5 mN between two identical ink drops, each carrying a charge of -1Charles Augustin de Coulomb's inverse-square law for electric force and Newton's inverse-square law for gravitThree charges lie on a line: q1 = +2.0 nC on the left, q2 = +5.0 nC in the middle, and q3 = -3.0 nC on the rigA small positive test charge is placed at a point in space near a charge distribution, and the force on it is What are the SI units of the electric field?A positive point charge and a negative point charge of equal size sit in space. In which direction do the elecA charge Q produces an electric field described by E = k|Q|/r^2. At a distance of 2 cm from the charge, how doA doorknob is a spherical metal conductor with diameter 5.0 cm and a static charge of -1.5 nC spread over its A closed box contains no electric charge anywhere inside it. If 11 electric field lines enter through one sideFive electric field lines are drawn coming out of a point charge of +5 nC. Using the same drawing convention, Two uniform electric fields are superimposed at a point: E1 = 14 N/C pointing along the positive x-axis, and EElectric potential energy per unit charge at a point in space is given a special name. What is that quantity cA charge moves through a uniform electric field of 2.0 N/C, aligned with the x-direction, from x = 5.0 m to x In an X-ray tube, electrons are accelerated across a 10 cm gap by a uniform electric field of magnitude 100 kNIn the same X-ray tube, an electron of charge -1.602 x 10^-19 C starts at rest at the source and crosses the 0A doorknob carries a charge q1 = -1.5 nC, treated as concentrated at its center. A speck of dust carrying q2 =A group of three separate point charges q1, q2, and q3 sits near a given point in space. According to the way What is the electric potential 1.0 m from a point charge of Q = -25 nC?A negative charge sits 10 m from a fixed positive charge. In which direction should the negative charge be movFour charges of Q = 10 nC sit at the four corners of a square with 10 cm sides. How much energy is required toTwo metal plates are charged so that one plate holds a magnitude of charge Q and the potential difference betwWhat is the name of the SI unit of capacitance, and after which scientist is it named?A parallel-plate capacitor has plates of area 1.00 m^2 separated by 0.0010 m, with nothing between the plates.A capacitor with capacitance 8.9 x 10^-9 F has a voltage of 3.00 x 10^3 V applied across it. Using Q = CV, howA 10 microfarad capacitor is to store 120 microcoulombs of charge. Using V = Q/C, what voltage battery is needA capacitor of 10 microfarads is charged to 12 V. Using U_E = (1/2) C V^2, how much energy is stored in the caA capacitor holds a fixed amount of charge Q on its plates. If the top plate happens to carry the positive chaAn insulating material is placed between the plates of a charged capacitor that has been disconnected from itsA charged, disconnected capacitor has a dielectric slipped between its plates. Compared with the same capacitoA parallel-plate capacitor with a dielectric has capacitance C = kappa epsilon_0 A / d, where kappa is the dieA camera flash capacitor of 200 microfarads is charged to a potential difference of 100 V. Using U_E = (1/2) CThat same 200 microfarad camera-flash capacitor uses a 0.010 mm thick sheet of nylon (dielectric constant kappIf the distance between the plates of a capacitor is doubled while the plate area and everything else stays fiIf the plate area of a parallel-plate capacitor is doubled while the plate separation stays the same, how doesA parallel-plate capacitor has its plate area doubled and its plate separation reduced by a factor of four at A parallel-plate capacitor has a plate area of 200 cm^2 and a plate separation of 10 micrometers, giving a meaA storm cloud sits 2 km above the ground, and the lower surface of the cloud spans about 2 km^2. Treating the