## Principles of Electricity and Electromagnetism |

### From inside the book

Results 1-3 of 87

Page 73

If the bubble is raised to a potential V by being touched with a wire from a static

machine , show that the radius of the bubble increases to r , where r is

( 13 – ) + 4T ( v2 – a ? ) - = 0 4 . In the discussion of the quadrant electrometer in ...

If the bubble is raised to a potential V by being touched with a wire from a static

machine , show that the radius of the bubble increases to r , where r is

**given**by P( 13 – ) + 4T ( v2 – a ? ) - = 0 4 . In the discussion of the quadrant electrometer in ...

Page 74

11 . An electrostatic voltmeter is constructed in the form of a rotary variable

condenser with n movable plates . The electrostatic torque is opposed by the

restoring torque of a fiber which is

the plates .

11 . An electrostatic voltmeter is constructed in the form of a rotary variable

condenser with n movable plates . The electrostatic torque is opposed by the

restoring torque of a fiber which is

**given**by ko , where e is the angle of entry ofthe plates .

Page 308

Show that the torque on an elementary whirl of current i having an area a (

moment m = moja ) in a magnetic field H is

on such an elementary circuit can be written ( m . grad ) H by which is meant the

vector ...

Show that the torque on an elementary whirl of current i having an area a (

moment m = moja ) in a magnetic field H is

**given**by m X H . Show that the forceon such an elementary circuit can be written ( m . grad ) H by which is meant the

vector ...

### What people are saying - Write a review

We haven't found any reviews in the usual places.

### Other editions - View all

### Common terms and phrases

angle applied approximately assumed atom axis becomes calculated capacity carrying cell characteristic charge circuit closed coil component condition conducting conductor connected considered constant curve density depends determined dielectric difference direction discharge discussion distance effective electric electrons element energy equal equation evident expression factor field flow flux force frequency function galvanometer given grid hence impedance important increases indicated induction integral ions known length limited linear load losses magnetic magnetic field magnitude maximum means measured mechanical metal meter method negative normal obtained oscillations parallel path period phase placed plate positive potential present produced proportional quantities radius ratio reduced region relation represents resistance respect result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero