1. When a lightning strikes from the cloud to the ground, current as high as 25,000 amperes can occur and last for about 40µs. How much charge is transferred from the cloud to the ground during sucha strike?
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- 13.As the electric charges travel around the circuit they lose electric potential energy. As electrons move through the wire, they collide with atoms. Their average kinetic energy remains constant. why ??????3. When a potential difference of 12 V is applied to a wire 6.9 m long and 0.33 mm in diameter, the result is an electric current of 2.1 A. What is the resistivity of the wire? Chap 21_#18
- Electrogenic fish, like electric eels, have the ability to create fairly large voltages that can be used for defense or to stun their prey (see the photo). The electric eel has three organs along the length of its body that allow it to produce electricity. The organs contain special cells, called electrocytes, that can generate a voltage of 0.15 V/cell. When aligned, the cells resemble a stack of capacitors connected in series that allow a current of ions to flow through them. Eels are capable of producing a discharge at 860 V with a current of 1.0 A. (a) How much electrical power is delivered by the eel during a discharge? Use the information above. (b) How many cells would have to be aligned to produce a discharge voltage of 860 V? (c) What is the ratio of the capacitance of a single electrocyte to that of the equivalent capacitance of the entire stack of cells? (a) Number (b) Number (c) Number Units Units Units ◄► Copyright © 2006 Steven G. Johnson and donated to Wikipedia under…A defibrillator passes 10.5 A of current through the torso of a person for 0.011 s. How much charge moves in C? How many electrons pass through the wires connected to the patient? e- -911+²7. Lightning discharges and lightning occur when charges are separated at different heights in the clouds, and lightning is a charge transfer with the ground where the voltage between cloud and ground is 1.0 MV. In a flash, the charge 1.0 C can be transferred during a time of 2.0 ms. (a) How many electrons correspond to the charge in such a flash? (b) Calculate the average current in the lightning. (c) What electrical power is developed in the lightning, and what is the energy? (d) If the cloud is at an altitude of 2.0 km, what is the electric field strength before the lightning and what is the force on an electron in the field?
- please answer this question4. What value resistor will discharge a 1.0 µF capacitor to 10% of its initial charge in 2.0 ms?A) if a current in a wire is 5.0 A, how many coulombs of charge pass a point in the wire in 1 min? B) what is the current if 6.0x10^3 C pass a point in a circuit in 10.0 min? C) if a current in a circuit is 12 A , how many electrons pass a point in 1h?
- 7. A capacitor with a capacitance of C = 27.7 μF is slowly charged by a constant current of I = 53.7 nA. How long does it take to charge the capacitor to a voltage of V = 24.4 V? This is not and will not be graded*20. "Two cylindrical rods, one copper and the other iron, are iden- tical in lengths and cross-sectional areas. They are joined end to end to form one long rod. A 12-V battery is connected across the free ends of the copper-iron rod. What is the voltage between the ends of the copper rod?2 What is the SI unit of resistance? A Ω V F In solid metals, which charged particles are free to move throughout the object? Select any/all correct answers. protons neutrons electrons 4 Which factor(s) affect the current in a conductor? Select any/all correct answers. cross-section area density of the charged particles drift speed of the charged partiçles