Wave Motion | Polarisation

Question 1

EM radiation consists of _ and _ fields

Answer 1

E H

Question 2

E is the __ field, H is the ___ field

Answer 2

Electric, Magnetic

Question 3

The electric field arises from ___

Answer 3

voltage

Question 4

The magnetic field arises from ___

Answer 4

current

Question 5

Polarisation is noted with reference to the ___ field, which is always parallel to its antenna

Answer 5

eletrical

Question 6

NDBs are ___ polarised

Answer 6

vertically

Question 7

VORs and Localisers are ___ polarised

Answer 7

horizontally

Question 8

With linear polarisation, oscillation is ___

Answer 8

fixed in place

Question 9

With circular polarisation, the plane is ___

Answer 9

rotating

Question 10

With circular polarisation, the plane rotates the E and H components of the wave spin about the axis at a rate equal to the ___.

Answer 10

frequency

Question 11

Circular polarisation requires a ___ antenna

Answer 11

helical

Question 12

Circular polarisation is used for ___

Answer 12

GPS

Question 13

Circular polarisation can reduce __ clutter when used with radar

Answer 13

rain

Question 14

Polarisation can change a lot over ___ distances with ___ frequencies

Answer 14

long, high