27. Resistors & DC Circuits
Intro to Current
05:38
Learn with other creators
Practice this topic
- Multiple Choice
A lightning bolt hits the ground carrying a current of 3 × 104 A. If the strike lasts 50 ms, how much charge enters the ground?
1300views42rank4comments - Multiple ChoiceWhich of the following is always true about capacitors and batteries?691views
- Multiple ChoiceA wire is connected to the positive and negative plates of a capacitor. Electrons in the wire feel an attraction toward the positive plate of a capacitor, and a repulsion from the negative plate. What is true about the motion of these electrons?779views
- Textbook Question
An aluminum wire consists of the three segments shown in FIGURE P27.64. The current in the top segment is 10 A. For each of these three segments, find the current density J. Place your results in a table for easy viewing.
592views - Textbook Question
A superconducting magnet carries a 100 A current through a 0.50-mm-diameter superconducting wire that is wound into a coil. How much charge flows through the wire in 15 minutes?
47views - Textbook Question
What diameter should the nichrome wire in FIGURE P27.62 be in order for the electric field strength to be the same in both wires?
15views - Textbook Question
The current in a 2.0 mm x 2.0 mm square aluminum wire is 2.5 A. What are (a) the current density and (b) the electron drift speed?
49views - Multiple ChoiceWhich of the following best describes how a switch functions in an electrical circuit?119views