7. Resistance and Resistivity __________ a) As the length of a wire increases th

Question

7. Resistance and Resistivity __________ a) As the length of a wire increases the resistance of the wire will A) increase B) decrease C) remain the same __________ b) As the length of a wire increases, the resistivity of the wire will A) increase B) decrease C) remain the same __________ c) As the cross-sectional area of a wire increases, the resistance of the wire will A) increase B) decrease C) remain the same __________ d) As the cross-sectional area of a wire increases, the resistivity of the wire will A) increase B) decrease C) remain the same 8. A fuse consists of a piece of metal with low melting point. If the current in the circuit rises too high, the metal heats up, melts, and breaks the circuit. Suppose you want to install a 30 A fuse in your house circuit. Where would you put a fuse so the total current in the house never exceeds 30 A? Be very specific. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 9. Seven resistors are connected in series with a power supply. If another resistor is added to the circuit in series: _______ a) How does the current change from resistor to resistor? A) increase B) decrease C) remain the same _______ b) The current through the power supply will A) increase B) decrease C) remain the same 10. Seven resistors are connected in parallel to a power supply. If another resistor is added to the circuit in parallel: _______ a) The current in each resistor will A) increase B) decrease C) remain the same _______ b) The current through the power supply branch will A) increase B) decrease C) remain the same

Explanation / Answer

increase remain hte same Resistance = resistivity * length/area this equation solves all questions

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