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### 41 Cards in this Set

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 Coulomb's Law states that the electrical force is proportionate to the ______ and inversely proportionate to the _______ 1)charge 2)square of the distance -F( negative electric force) means There is attraction +F (positive electric force) means There is repulsion Electric force (formula) = Kxq1xq2 / r^2 *applies to point charges Force experienced by a particle (formula) = qE q (charge) E (electric field) Electric Field (formula) = kxq/ r^2 What is Electric Potential Energy? The stored energy a charge possesses with respect to position When a charge is move against the field...... 1) negative work is done 2)EPE increases When a charge is moving with the field...... 1) positive work is done 2) EPE decreases When charges are at infinity EPE is 0 Electric potential is the.... amount of EPE available at a certain point Electric Potential Formula V= K.Q/r When EP is negative..... No work is being done to move the charge The capacitance of a capacitor can be increased by...... Moving the plates closer together Resistance depends on...... 1) Length 2) Cross Sectional Area (width) * directly prop to length * inv prop to width The direction of the electric field is that of a + charge Excess charge always resides on.... The surface of a conductor because they are free to move and feel repulsive forces from each other When a particle passes through a both an Electric & Magnetic Field qE=vqB Ohm's Law V = I x R Power P = I x V = I^2 X R = V^2 / R Heat Dissapated H = I^2 x R X t Equivalent Resistance of Two Resistors in Series Rt= R1 + R2 + R3 Equivalent Resistance of Two Resistors in Parallel 1/Rt= 1/R1 + 1/R2 + 1/R3 Equivalent Capacitance of Two Capacitors in Series 1/Ct= 1/C1 + 1/C2 Equivalent Capacitance of Two Capacitors in Parallel Ct= C1 + C2 Magnetic Force on a Moving Charge F= qVB Radius of the Circle Described by a Charged Particle Moving Perpendicular to a Magnetic Field mv^2/r = vQB The X symbol for current traveling down a wire will cause the magnetic field to.... rotate CLOCKWISE If a charged particle is negative the direction of the force vector would be..... Opposite to that predicted by the right hand rule When a charge moves parallel to the field... There is no force Magnetic force on current carrying wire F = BIL I- current L- length B- magneitc field How is Electrical Current induced? By moving a conductor through a magnetic field Magnetic flux formula Φ (phi)= B x A B- mag field strength A- area Three ways of changing magnetic fux 1) Change Field Strength 2) Change Area 3) Change angle between area & mag field Faraday's Law states? Induced EMF is a measure of the change in the magnetic flux over time. Flux can be changed by Changing the magnetic field direction Transformer Vs/ Vp = Ns/Np What happens to the electric field when a dielectric is inserted The electric field reduces Lenz's Law States The direction of the induced current is opposite to that of the source E= - ΔΦ / Δt What is Magnetic Flux? It is the strength of a magnetic field for a given area Once a conductor is moved through a mag field an emf is induced, only if there is a circuit the emf induces a........ current