Two identical parallel conducting wires, 1 and 2, carry currents of 50 mA and 25 mA in opposite directions as shown in the diagram, Identify the area(s), X, Y, or Z, where the magnetic field might be equal to zero X 50 m A Y 25 m A 2 Z Select one: O a. X Ob. Y OC. Z O d. Y and Z Many asthma attacks are due in part to airborne dung pellets from dust mites. A scientist in Britain invented a fabric for use in air filters and carpets that removes the airborne pellets by lectrostatic attraction. If the dung pellets are neutral or have a positive or negative charge, the fabric in the air filter must contain elect one: a. all fibres that are neutral b. some fibres that are positively charged and some fibres that are neutral C. some fibres that are positively charged and some fibres that are negatively charged d. some fibres that are negatively charged and some fibres that are neutral Use the following informationUse the following information to answer the next question. Resultant Electric Field Three equal positive charges are located at the vertices of an equilateral triangle. The direction of the electric field at point P is Select one: O a. into the page O b. out of the page O c. to the left of the page O d. to the right of the pageAn initially uncharged ebonite (hard rubber) rod is rubbed with an initially uncharged piece of cat's fur. As a result, the fur becomes positively charged and the ebonite becomes equally charged negatively. This best illustrates Select one: O a. the law of conservation of charge O b. the law of conservation of mass O c. Coulomb's law O d. Ohm's law P . 30 cm A + 2CA + 30 50 cm B + 40 Refer to the diagram above. Charges A and B are fixed, but charge P is free to move. If the mass of P is 1.0 g, what is its acceleration? Select one: O a. 2.88 x 1014 m/s2 O b. 5.99 x 1014 m/s O c. 6 65 x 1014 m/s2 O d. 8.87 x 10 14 m/sAn electron flows in a wire between two magnets as shown. In what direction will the magnetic force tend to push the wire? of S N Select one: O a. Left O b. Right O c. Up O d. Down A proton moves across a field of magnetic induction of 0 36 T. It follows a circular path of radius of 0. 20 m. The proton's speed is Select one: O a. 9.6 x 102 m/s O b. 69 x 103 m/s O c. 6.9 x 105 m/s Od. 6.9 x 10 m/s Millikan's oil drop experiment suggested that Select one: Oa. matter is quantized O b. charge is quantized O c. energy is quantized O d. momentum is quantizedA physics teacher orders a new pen laser that has a wavelength of 460 nm. The location in the spectrum of the laser beam produced by this pen laser is most likely Select one: O a. red O b. orange O c. blue O d. ultraviolet Identify the graph that best communicates the frequency of an electromagnetic wave as a function of wavelength. a b frequency frequency wavelength wavelength C. d frequency frequency wavelength wavelength Select one: a. A Ob. B O c. C Od . DAlbert Michelson used a rotating mirror and a plane mirror, as shown in the diagram, to precisely determine the speed of light. This allowed a pulse of light to be reflected and observed at the detector only when the rotating mirror rotated at a proper frequency. Determine the separation distance between Michelson's rotating 8-sided mirror and the plane mirror if the mirror must be rotating at 624.5 Hz to allow the observer to detect the reflected light pulse. Light source Rotating Plane mirror mirror Observer (detector) Select one: O a. 15.0 km O b. 30.0 km O c. 60.0 km O d. 120 km As a light wave crosses the boundary between two different mediums, its remains constant Select one: O a. angle O b. speed O c. frequency O d. wavelength