Key words Physics unit 4 0.0 / 5 ? Physicskey wordsA2/A-levelAQA Created by: SophieCreated on: 20-01-15 13:22 27910538416 Across 1. the frequency if an oscillating system at resonance (8, 9) 5. emf induced in the spinning coil of an electric motor or in any coil in which the current is changing. It acts against the applied pd (4, 3) 6. the amplitude of vibration of an oscillating system subjected to a periodic driving force has the same frequency as resonant frequency (9) Down 2. the frequency of free oscillations of an oscillating system (7, 9) 3. the total kinetic energy after the collision is equal to total kinetic energy before (7, 9) 4. a line/surface in a field along which the electric/gravitational potential is at a constant (13) 7. when a current is induced by electromagnetic induction, the direction of the induced current is always such as to oppose the change that causes it (5, 3) 8. the rate of change of angular displacement of an object in circular motion (7, 5) 9. a regoin where the field strength is the same magnitude and direction at every point in the field (7, 5) 10. for two point charges Q and q, at distance r apart, the force between the two charges s given by F=Qq/... where Eo is permittivity of free space (8, 3, 2, 5)
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