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- current in the crcuit after 1 usec?If the 0.300-mA current through the calculator mentioned is carried by electrons, how many electrons per second pass through it?sectional area of the wire. For a given current, as the diameter 9.4 Check Your Understanding The current density is proportional to the current and inversely proporional to the area. If the current density in a conducting wire increases, what would happen to the drift velocity of the charges in the wire? is the significance of the current density? The current density is proportional to the curront and the current is the
- 125V is applied across a point 4mm (Radius), 10m long wire the current density is 1.2×104Am-2 find resistivity of wire?A brine sample recovered from depth of 8400 ft has a measured resistivity of 0.28 ohm-m at temperature of 68F. What is the resistivity of this brine in the reservoir?Calculate the total current IT:
- The current of an election beam has a measuredcurrent of I=50.00A with a radius of 1.00 mm2. What is the magnitude of the current density of the beam?A 10-gauge copper wire has a cross-sectional area A=5.26mm2 and carries a current of I=5.00A . The adensity of copper is =89.50g/cm2 . One mole ofcopper atoms (6.021023atoms) has a mass ofapproximately 63.50 g. What is the magnitude of the drift velocity of the elections, assuming that each copper atom contributes one free electron to the current?Check Your Understanding In Example 9.4, the drift velocity was calculated for a 2.053-mm diameter (12-gauge) copper wire carrying a 20-amp current. Would the drift velocity change for a 1.628-mm diameter (14-gauge) wire carrying the same 20-amp current?