The resistance of the skin on a person's finger is typically about 37,000 N. How much voltage would be needed to cause a current of 0.001 A to flow into the finger? (This is about enough current to just be felt by most people.)

If the 0.130 mm diameter tungsten filament in a light bulb is to have a resistance of 0.230 Ω at 20.0°C, how long should it be?

The current in a 3.0 V battery of a pocket calculator is 0.17 mA. In one hour of operation, (a) how much charge flows in the circuit and (b) how much energy does the battery deliver to the calculator circuit?

Discussion: Ohm's Law describes the relationship between the resistance (R) of a wire, the roltage drop across it (V), and current through it (D): V = RI (1) Applying a known current to a wire and measuring the voltage across it will lt you determine the resistance of the wire by solving equation 1: R =, (2) The resistance of a partieular element depends on its geometry, the resistivity and the temperature. Resistivity is the tendency of the material to behave as a resistor and is an inherent property of a material, in the same sense that density or thermal expansion are inherent properties. Materials with lower resistivity, like copper, are good conductors of electricity and widely used in eireuit components while those with larger resistivity, like rubber, are used as insulators. For a wire with length (L), cross-sectional area (A), and made from a material with resistiity (p) the resistance (R) will be given by the following equation: R= L (3) In case that the geometry (length and…