If you cut a long wire in half, what would you have to do to its diameter in order to keep its resistance constant? Explain your reasoning.
Answer to relevant QuestionsFrom the electric power relationship P = I2R, it would appear that when increasing the value of an appliance’s resistance, its power output would also increase. Yet a 60- W light bulb has less resistance than its lower ...The drift speed of electrons in a complete circuit, is typically a few millimeters per second. Yet a lamp 3.0 m away from a light switch turns on instantaneously when you flip the switch. Explain this apparent paradox. Imagine that some protons are moving to the left at the same time that some electrons are moving to the right past the same location. (a) Will the net current be (1) to the right, (2) to the left, (3) zero, or (4) none of ...A material is formed into a long rod with a square cross-section 0.50 cm on each side. When a 100-V voltage is applied across a 20-m length of the rod, a 5.0-A current is carried. (a) What is the resistivity of the ...(a) If the resistance of the wire in Exercise 29 cannot vary by more than from its value at ±5.0%, to what operating temperature range should it be restricted? (b) What would be the operating range if the wire were, ...
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