do electric currents that oscillate at radio frequencies have special properties unlike A.C. or D.C.?
An interesting question. Yes they do. As you increase the frequency of an alternating current in a wire, more and more of the energy is radiated into space. A wire carrying, say 50 Hz AC would need to be thousands of km long for a noticeable power loss. VLF signals with frequencies of a few thousand Hz are used to communicate with submarines, and the transmitting aerial needs to be a couple of km long. As you’ll know, cellphones use frequencies of a few hundred MHz and their aerials are only a few cm. long. The other interesting thing about very high frequency current is that when you get to high radio frequencies, the current is restricted to the outside of the conductor. So you don’t need a solid cable, a hollow tube will do just as well.
|
|
New Honeywell Digital Oscillating Electric Portable Heater with timer $34.92 |
|
|
2 WHITE FLOOR STANDING 3 SPEED ELECTRIC PORTABLE COOLING OSCILLATING FANS 120V $29.99 |
|
|
NEW Portable Electric Oscillating Halogen Space Heater $53.34 |
|
|
New Portable Electric Best W Oscillating Halogen Space comfortable cosy Heater $62.99 |
|
|
Lloytron F2301 2000w Living Flame Oscillating Mains Electric Heater Fire White $118.51 |
|
|
Air King 5429 Oscillating Ceramic Heater – Ceramic – Electric – Gray $34.47 |
|
|
Lasko Adjustable Height Oscillating Stand Fan, Portable Electric Air Cooler (AC) $56.95 |
|
|
Portable Oscillating Ceramic Tower Heater Electric Space Heat w/ Adj Thermostat $69.99 |
|
|
360° Oscillating Portable Ceramic Heater, Electric Space Heat Thermostat Remote $99.00 |
|
|
Lasko Adjustable Height Oscillating Stand Fan, Portable Electric Air Cooler (AC) $56.95 |
|
|
Ceramic Portable Tower Heater, Electric Oscillating Space Heat w/ Remote Control $129.00 |
|
|
Portable Ceramic Heater, Electric Oscillating Space Heat w/ Thermostat & Remote $99.99 |
|
|
Oscillating Ceramic Portable Heater, Mini & Compact Electric Heating, Lasko 5429 $69.99 |
|
|
Portable Tower Heater, Oscillating Ceramic Electric Space Heat w/ Adj Thermostat $64.95 |
|
|
Portable Ceramic Tower Heater, Oscillating Space Heat Electric Thermostat Remote $79.95 |
|
|
Ceramic Portable Pedestal Heater, Electric Oscillating Space Heat Remote Control $89.99 |
|
|
Soleus 16″ Oscillating Pedestal Fan AC w/ Remote Portable Electric Air Cooler AC $79.00 |
|
|
Portable Oscillating Electric Fan w/ Remote Control Lasko WindTunnel ACAirCooler $79.95 |
|
|
Honeywell Portable Oscillating Ceramic Electric Heater $38.21 |
|
|
Oscillating Halogen Heater Portable Electric 1200W 800W 400W Safe Quality Light $40.76 |
|
|
Lasko Wind Tower Small Oscillating Desk Electric Fan $36.42 |
|
|
NEW Lasko Oscillating Floor Stand Pedestal Electric Fan Fast Ship $39.95 |
|
|
Portable Ceramic Electric Tower Oscillating Space Heater w/ Remote Control NEW $62.95 |
|
|
NEW HOMEBASIX 9948605 DF1015 ELECTRIC HALOGEN PARABOLIC 14″ OSCILLATING HEATER $34.95 |
|
|
Kaz Honeywell HZ-338 Digital Oscillating Ceramic Heater Ceramic-Electric-Black $82.99 |
|
|
Oscillating Floor Stand Pedestal Electric Fan 16″ NEW $26.95 |
|
|
NEW LASKO 766236 CERAMIC OSCILLATING ELECTRIC HEATER DESIGNER QUIET THERMOSTAT $48.99 |
|
|
Dayton Electric Oscillating Pedestal Heater, 120V $29.99 |
|
|
Oscillating Electric Fan w/ Remote Control ~ Pedestal / Floor Sunpentown SF-1468 $59.00 |
|
|
Oscillating Electric Fan ~ 3-Speed Standing Floor Air Cooler, Sunpentown SF-1467 $49.00 |
|
|
Desktop Tower Oscillating Electric Unique Desk Fan Quiet Pivoting Top Module NEW $36.95 |
|
|
Holmes Hfh5606-um Oscillating Heater – Electric – White, Gray (hfh5606um) $29.84 |
|
|
Wind Tower Fan Small Oscillating Desk Electric Fans $34.52 |
|
|
NEW Honeywell HZ-338 Digital Oscillating Ceramic Heater, Electric, Black w/warra $88.95 |
|
|
HOMEBASIX DF1015 PORTABLE HALOGEN PARABOLIC OSCILLATING ELECTRIC HEATER 800W NEW $65.95 |
|
|
ROTATING HOME ELECTRIC FAN COOLING FAN OSCILLATING FANS BLACK AND SPACE SAVER $49.99 |
|
|
Air King Model 8566 Electric Oscillating Pedestal Heater, 1500/900 Watts, 120 V $36.49 |
|
|
Bionaire BPF1145B-U Wide Oscillating Electric Power Fan $54.95 |
|
|
Lasko Designer 6435 Oscillating Ceramic Heater Ceramic – Electric Thermostat $63.99 |
|
|
Lasko 5429 Oscillating Ceramic Heater Ceramic-Electric-Gray Handle Thermostat $56.99 |
|
|
Oscillating Ceramic Portable Heater, Mini & Compact Electric Heating, Lasko 5429 $69.99 |
|
|
Portable Ceramic Tower Heater, Oscillating Space Heat Electric Thermostat Remote $169.99 |
|
|
Portable Tower Heater, Oscillating Ceramic Electric Space Heat w/ Adj Thermostat $69.99 |
|
|
Portable Ceramic Heater, Electric Oscillating Space Heat w/ Thermostat & Remote $99.99 |
|
|
Adjustable Height Oscillating Stand Fan, Lasko Electric Portable Air Cooler (AC) $59.95 |
|
|
High Velocity Oscillating Blower Fan, Lasko 4930 Portable Electric Air Cooler AC $109.95 |
|
|
16″ Oscillating Stand Fan Wht – Lasko 1646 Portable Electric Air Cooler (AC) $68.95 |
|
|
Lasko Adjustable Height Oscillating Stand Fan, Portable Electric Air Cooler (AC) $59.95 |
|
|
Oscillating Ceramic Portable Tower Heater, Space Heat Electric Thermostat Remote $85.95 |
|
|
Ceramic Portable Pedestal Heater, Electric Oscillating Space Heat Remote Control $89.99 |
|
|
Portable Tower Heater, Oscillating Ceramic Electric Space Heat w/ Adj Thermostat $64.95 |
|
|
New Personal Portable Small Power Compact Office Oscillating Desk Electric Fan $49.99 |
|
|
New Evergain FIR Bio Energy Heater Far Infrared Space Save Electric Oscillating $149.00 |
|
|
360° Oscillating Portable Ceramic Heater, Electric Space Heat Thermostat Remote $99.00 |
|
|
PATTON TWIN CERAMIC ELECTRIC SPACE HEATER OSCILLATING MODEL PCH4199HD SUPER! $39.99 |
|
|
14″ OSCILLATING ELECTRIC HEATER 800W 800 Watts HALOGEN HEATER W/TIMER 110V $59.99 |
|
|
Comfort Zone CZ446 Oscillating Ceramic Element Electric Heater/Fan FREE SHIPPING $41.76 |
|
|
ROTATING HOME ELECTRIC FAN COOLING FAN OSCILLATING FANS BLACK STANDING STAND FAN $29.99 |
|
|
ROTATING OFFICE ELECTRIC FAN COOLING FAN OSCILLATING FANS SMALL DESK QUIET FAN $29.99 |
|
|
ROTATING OFFICE ELECTRIC FAN COOLING FAN OSCILLATING FANS WITH REMOTE CONTROL $49.99 |
|
|
ELECTRIC ROTATING HOME FAN COOLING FAN OSCILLATING FANS AJUSTABLE QUIET OFFICE $29.99 |
|
|
Lasko 1500W Ceramic Electric Space Heater – Portable, Compact ,Oscillating – NEW $47.10 |
|
|
NEW! Comfort Zone Oscillating Flat Panel Dual Halogen Electric Heater CZHTV9 $44.50 |
|
|
Ceramic Portable Tower Heater, Electric Oscillating Space Heat w/ Remote Control $129.00 |
|
|
Lasko Wind Tower Small Personal Electric Oscillating Office Table Desk Fan $41.99 |
|
|
Oscillating Lasko Electric Portable Ceramic Air Heater Digital Display 5536 $59.99 |
|
|
Oscillating Ceramic Electric Office Room Space Heater HZ-370GP $79.99 |
|
|
Lloytron F2104 1600W 4 Bar Halogen Portable Heater Oscillating Rotating Electric $55.29 |
|
|
Portable Oscillating Wall Mount Fan, Compact Mountable Lasko Electric AC Cooler $87.95 |
|
|
18 Inch Adjustable Cooling Electric Floor Fan Oscillating White 90 Degree NEW $75.95 |
|
|
DRW NAH938 1200W 3 Bar Halogen Portable Heater Oscillating Rotating Electric $35.56 |
|
|
NEW SPT SUNPENTOWN ELECTRIC MINI CERAMIC OSCILLATING TOWER SPACE HEATER SH-1507 $59.96 |
|
|
Holmes HFH5606-U Electric Oscillating Power Heater NEW $39.95 |
|
|
Oscillating Halogen Heater Portable Electric w Remote $44.16 |
|
|
New Oscillating Fan Lasko stand works three electric speeds adjustable height $36.99 |
|
|
NEW Parabolic Oscillating Heater Ea. Portable Electric Heaters DF1015 $57.31 |
Tags: electric oscillating circuit, electric oscillating fan, electric oscillating heater, electric oscillating saw, electric oscillating tool, fan, fans, floor, oscillating, oscillating-desk-fans-store