## Principles of Electricity and Electromagnetism |

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Page 301

on the movable

the restoring torque of a spiral spring. If this restoring torque is proportional to the

displacement, the displacement is proportional to the product of the currents in ...

on the movable

**coil**is measured by the angular displacement of a pointer againstthe restoring torque of a spiral spring. If this restoring torque is proportional to the

displacement, the displacement is proportional to the product of the currents in ...

Page 323

moving element depends on the magnetic interaction between a currentcarrying

of basic importance in all branches of electrical measurement, and a discussion ...

moving element depends on the magnetic interaction between a currentcarrying

**coil**and a permanent magnet are known in general as galvanometers. They areof basic importance in all branches of electrical measurement, and a discussion ...

Page 325

In fact, instruments of this type with the necessary refinements can be made more

sensitive than the moving-

of the order of 10-1” amp. can be readily detected. However, they are more ...

In fact, instruments of this type with the necessary refinements can be made more

sensitive than the moving-

**coil**instruments which will be discussed later; currentsof the order of 10-1” amp. can be readily detected. However, they are more ...

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alternating current alternating-current amplitude angle angular velocity anode antenna applied approximately armature assumed atom axis calculated capacity cathode centimeter characteristic circuit coefficient coil component condenser conducting conductor considered curl current flowing curve deflection density determined dielectric constant direct-current direction discharge displacement distance effective electric field electromotive force electrons electrostatic element energy equal equation ferromagnetic flux force frequency function galvanometer given grad grid hence hysteresis impedance induction integral ions known Laplace's equation linear load magnetic field magnetic moment magnitude maximum measured meter motor negative normal obtained ohms oscillations output parallel phase plane plate polarization positive potential difference potentiometer produced proportional quantity radiation radius ratio reactance region represents resistance resonant rotation Show shown in Fig solenoid solution substance surface temperature terminals theorem torque transformer tube unit vector voltage volts wave wire written zero