Physics 121 Practice Problem Solutions 07 Current and Resistance
... PROBLEM 121P07-4Q: If you stretch a cylindrical wire and it remains cylindrical, does the resistance of the wire (measured end to end along its length) increase, decrease, or remain the same? ...
... PROBLEM 121P07-4Q: If you stretch a cylindrical wire and it remains cylindrical, does the resistance of the wire (measured end to end along its length) increase, decrease, or remain the same? ...
Lecture 12 Chapter 26 Capacitance - Examples
... no net transport of charges – Same potential everywhere, no E field inside or on surface so no electric F on electrons ...
... no net transport of charges – Same potential everywhere, no E field inside or on surface so no electric F on electrons ...
Observation Experiment: Ohm`s Law 3.1 Use the equipment
... 3.6 Explain A person accidentally touches a 120 V electric line with one hand while touching a ground wire with the other hand. Determine the current through the body when the hands are dry (100,000 W resistance) and when wet (5000 W resistance). Are either or both currents dangerous? Explain how yo ...
... 3.6 Explain A person accidentally touches a 120 V electric line with one hand while touching a ground wire with the other hand. Determine the current through the body when the hands are dry (100,000 W resistance) and when wet (5000 W resistance). Are either or both currents dangerous? Explain how yo ...
1) Which curve represents the correct variations of the magnetic field
... 31. A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and it is in the plane of the loop. If steady current I is established in the wire as shown in the figure, the loop will : 1) Rotate about an axis paralle ...
... 31. A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and it is in the plane of the loop. If steady current I is established in the wire as shown in the figure, the loop will : 1) Rotate about an axis paralle ...
Magnet
... Making a bulb light up A circuit has to be a complete circle. You connect the wire to either side of the battery, the positive and the negative side. Then you put one wire going up one side of the battery and one going up on the other side. So the wires go up on either side of the battery like a ci ...
... Making a bulb light up A circuit has to be a complete circle. You connect the wire to either side of the battery, the positive and the negative side. Then you put one wire going up one side of the battery and one going up on the other side. So the wires go up on either side of the battery like a ci ...
120 Essential Concepts in Physics-Ans - sacss-science
... 100. Fuses are used to prevent excessive current / current larger than its rating from entering the circuit. 101. Earth wire prevents electric shock to the user when he accidentally touches the metal casing of an appliance that has become live accidentally. 102. When the metal casing of an applianc ...
... 100. Fuses are used to prevent excessive current / current larger than its rating from entering the circuit. 101. Earth wire prevents electric shock to the user when he accidentally touches the metal casing of an appliance that has become live accidentally. 102. When the metal casing of an applianc ...
circuits
... current – positive charges move Electric current I is defined as the rate at which charge flows past a given point per unit time. 1 C/s = 1A ...
... current – positive charges move Electric current I is defined as the rate at which charge flows past a given point per unit time. 1 C/s = 1A ...
Series and Parallel Circuits
... What is the total voltage of the circuit? What is the resistance of each resistor? What is the voltage drop across each resistor? Label on your ...
... What is the total voltage of the circuit? What is the resistance of each resistor? What is the voltage drop across each resistor? Label on your ...
Galvanometer
A galvanometer is a type of sensitive ammeter: an instrument for detecting electric current. It is an analog electromechanical actuator that produces a rotary deflection of some type of pointer in response to electric current through its coil in a magnetic field.Galvanometers were the first instruments used to detect and measure electric currents. Sensitive galvanometers were used to detect signals from long submarine cables, and to discover the electrical activity of the heart and brain. Some galvanometers use a solid pointer on a scale to show measurements; other very sensitive types use a miniature mirror and a beam of light to provide mechanical amplification of low-level signals. Initially a laboratory instrument relying on the Earth's own magnetic field to provide restoring force for the pointer, galvanometers were developed into compact, rugged, sensitive portable instruments essential to the development of electrotechnology. A type of galvanometer that records measurements permanently is the chart recorder. The term has expanded to include use of the same mechanism in recording, positioning, and servomechanism equipment.