# What is the electric field strength of the microwave?

## What is the electric field strength of the microwave?

117.2 V/m

domestic microwave oven

Measurand | Value | Feature |
---|---|---|

electric field strength | 117.2 V/m (maximum) | – |

electric field strength | 121.3 V/m (maximum) | – |

magnetic flux density | 0.07103 µT (mean, calculated) | calculated for 50 Hz resp. 60 Hz |

magnetic flux density | 0.1–20 µT (maximum) | measurement bandwidth: 20 – 2000 Hz |

## How is microwave power calculated?

Microwave on full power for 2 minutes (120 seconds). Final temperature 30 degrees C. Temperature rise = 30-19=11 degrees C. Therefore, power = 1500 times 11 times 4.1868 divided by 120 = 576 watts.

**What is the peak magnetic field strength of these microwaves?**

The peak magnetic field strength in a residential microwave oven is 9.20 × 10−5 T.

### How do you calculate the electromagnetic field of a microwave oven?

Given its power output and the heating area, calculate the intensity of a microwave oven’s electromagnetic field, as well as its peak electric and magnetic field strengths Anyone who has used a microwave oven knows there is energy in electromagnetic waves. Sometimes this energy is obvious, such as in the warmth of the summer sun.

### How is the strength of an electromagnetic wave measured?

Here we need the gain g in terms of power ratio, so the usual gain G in dB must be converted first with: Now, the strength of an electromagnetic wave can be expressed in terms of electric field strength E (measured in V/m ), of magnetic field strength H (measured in A/m) or of power density S (measured in W/m2 ).

**How are Maxwell’s equations related to electric fields?**

Maxwell’s four equations describe how magnetic fields and electric fields behave. For example, if you wrap a wire around a nail and connect a battery, you make a magnet. Maxwell’s first equation, Ampère’s Law tells us how the magnet will push or pull other magnets.

#### How to calculate field strength at 100 m?

Assuming that the transmitter has an output power of Pt = 20 W, that the cable has a loss of 3 dB, and that the antenna has a gain of 18 dBi, we can estimate the field strength at 100 m distance. To take into account the loss in the cable, we just have to deduce the 3 dB loss from the 18 dBi gain and use a modified antenna gain of G = 15 dBi .