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Resistance: it's not Futile LG: to relate current & potential difference through resistance

Resistance: it's not Futile LG: to relate current & potential difference through resistance. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω)

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Resistance: it's not Futile LG: to relate current & potential difference through resistance

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  1. Resistance: it's not Futile LG: to relate current & potential difference through resistance

  2. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω) LG: to relate current & potential difference through resistance

  3. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω) Factors affecting Resistance: 1. type of material e.g. silver is a better conductor than copper LG: to relate current & potential difference through resistance

  4. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω) Factors affecting Resistance: 1. type of material e.g. silver is a better conductor than copper 2. cross-sectional area -thicker wires have less resistance LG: to relate current & potential difference through resistance

  5. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω) Factors affecting Resistance: 1. type of material e.g. silver is a better conductor than copper 2. cross-sectional area -thicker wires have less resistance 3. length -longer wires have more resistance LG: to relate current & potential difference through resistance

  6. Resistance: it's not Futile Electrical Resistance: the ability of a material to oppose the flow of electric current -measured in Ohms (Ω) Factors affecting Resistance: 1. type of material e.g. silver is a better conductor than copper 2. cross-sectional area -thicker wires have less resistance 3. length -longer wires have more resistance 4. temperature -resistance increases with temperature LG: to relate current & potential difference through resistance

  7. Resistance: it's not Futile Resistor: a device that reduces the flow of electric current -all loads provide resistance but resistors are sometimes added to reduce the current flow to specific areas of the circuit LG: to relate current & potential difference through resistance

  8. Resistance: it's not Futile Resistor: a device that reduces the flow of electric current -all loads provide resistance but resistors are sometimes added to reduce the current flow to specific areas of the circuit Short Circuit: a circuit without a load offers no resistance. -more & more electrons flow through the wire until it overheats and melts or catches on fire. LG: to relate current & potential difference through resistance

  9. Resistance: it's not Futile Measuring Resistance: an ohmmeter is connected in parallel with a resistor LG: to relate current & potential difference through resistance

  10. Resistance: it's not Futile Ohm's Law: the straight line relationship between voltage and current R = V I LG: to relate current & potential difference through resistance

  11. Resistance: it's not Futile e.g. A load has 1.2 A of current flowing through it. The voltage across the load is 6.0 V. Calculate the resistance of the load. LG: to relate current & potential difference through resistance

  12. Resistance: it's not Futile e.g. A load has 1.2 A of current flowing through it. The voltage across the load is 6.0 V. Calculate the resistance of the load. Given: current (I) = 1.2 A potential difference (V) = 6.0 V Unknown: resistance (R) Select: R=V I Solution: R = 6.0 1.2 = 5.0 Ω LG: to relate current & potential difference through resistance

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