MB e
... 4. Introducing different types of resistances to the student. Apparatus: 1. DC power supply (battery). 2. Meter bridge. 3. Galvanometer with the zero in the middle. 4. Unknown resistance. 5. Rheostat. 6. Resistance box. 7. Micrometer to measure the diameter of the wire. 8. Jockey. 9. Connecting wire ...
... 4. Introducing different types of resistances to the student. Apparatus: 1. DC power supply (battery). 2. Meter bridge. 3. Galvanometer with the zero in the middle. 4. Unknown resistance. 5. Rheostat. 6. Resistance box. 7. Micrometer to measure the diameter of the wire. 8. Jockey. 9. Connecting wire ...
MEASURING INSTRUMENTS
... A defined above, indicating instruments are those which indicate the value of quantity that is being measured at the time at which it is measured. Such instruments consist essentially of a pointer which moves over a calibrated scale & which is attached to a moving system pivoted in bearing. The movi ...
... A defined above, indicating instruments are those which indicate the value of quantity that is being measured at the time at which it is measured. Such instruments consist essentially of a pointer which moves over a calibrated scale & which is attached to a moving system pivoted in bearing. The movi ...
Magnetism and Electromagnetism
... wire suspended above a magnetic compass, Oersted was able to produce a definite motion of the compass needle in response to the current. What began as conjecture at the start of the class session was confirmed as fact at the end. Needless to say, Oersted had to revise his lecture notes for future cl ...
... wire suspended above a magnetic compass, Oersted was able to produce a definite motion of the compass needle in response to the current. What began as conjecture at the start of the class session was confirmed as fact at the end. Needless to say, Oersted had to revise his lecture notes for future cl ...
11-19-08
... 3. A 5.12 A current is set up in an external circuit by a 6 V storage battery for 5.75 min. How much is the energy of the battery reduced? ...
... 3. A 5.12 A current is set up in an external circuit by a 6 V storage battery for 5.75 min. How much is the energy of the battery reduced? ...
Ohm`s law. Linear Regression.
... directly proportional. That is, for a 10% increase in voltage there is also a 10% increase in current intensity. This is equivalent to saying that the ratio between the two is constant. This constant is named electric resistance (R): ...
... directly proportional. That is, for a 10% increase in voltage there is also a 10% increase in current intensity. This is equivalent to saying that the ratio between the two is constant. This constant is named electric resistance (R): ...
Operating DC Relays from AC and vice
... Just as it is impractical to operate a DC relay from AC, it is likewise impractical to operate an AC relay from DC. However, in an emergency, an AC relay may be operated from DC—provided certain precautions are taken. The first precaution is to provide some type of a residual break between relay cor ...
... Just as it is impractical to operate a DC relay from AC, it is likewise impractical to operate an AC relay from DC. However, in an emergency, an AC relay may be operated from DC—provided certain precautions are taken. The first precaution is to provide some type of a residual break between relay cor ...
File
... device in the modern world, and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem. Without circuit breakers (or the alternative, fuses), ho ...
... device in the modern world, and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem. Without circuit breakers (or the alternative, fuses), ho ...
Ohm*s Law
... To calculate resistance, R: put your finger over R, this leaves you with V over I, so the equation is R = V/I ...
... To calculate resistance, R: put your finger over R, this leaves you with V over I, so the equation is R = V/I ...
Sources of the Magnetic Field
... is above the larger loop (radius R) by a distance x >> R. Consequently, the magnetic field due to the current i in the larger loop is nearly constant throughout the smaller loop. Suppose that x is increasing at the constant rate of dx/dt = v. (a) Determine the magnetic flux through the area bounded ...
... is above the larger loop (radius R) by a distance x >> R. Consequently, the magnetic field due to the current i in the larger loop is nearly constant throughout the smaller loop. Suppose that x is increasing at the constant rate of dx/dt = v. (a) Determine the magnetic flux through the area bounded ...
Chapter 13: Inductance and Inductors
... Energy Stored by an Inductance • When energy flows into an inductor – Energy is stored in its magnetic field ...
... Energy Stored by an Inductance • When energy flows into an inductor – Energy is stored in its magnetic field ...
so the voltage across each light bulb is the same in both circuits. V /4 =2V
... By reason of symmetry, the magnetic field will be horizontal. Using the second right hand rule, it points to the right on the drawing. Using the right hand rule, for the force to be pointing up, the current I must be flowing in the direction opposite to I 0 D.2. ...
... By reason of symmetry, the magnetic field will be horizontal. Using the second right hand rule, it points to the right on the drawing. Using the right hand rule, for the force to be pointing up, the current I must be flowing in the direction opposite to I 0 D.2. ...
Name ______ period ____
... 31. Electric field lines point towards a _________________ charge, away from a _________________ charge and never _____________________ each other. 32. When there is an equal amount of positive and negative charges on an object, the object is ______________ 33. Electric force is similar to gravity b ...
... 31. Electric field lines point towards a _________________ charge, away from a _________________ charge and never _____________________ each other. 32. When there is an equal amount of positive and negative charges on an object, the object is ______________ 33. Electric force is similar to gravity b ...
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.