The electron density of a layer of ionosphere at a height $150\text{ km}$ from the earth's surface is $9 \times 10^{10}\text{ per m}^3$ . For the sky transmission from this layer up to a range of $250\text{ km}$ , the critical frequency of the layer is:
A
2 Hz
B
2.7 Hz
C
2.78 kHz
D
2.7 MHz

Question

The electron density of a layer of ionosphere at a height $150\text{ km}$ from the earth's surface is $9 \times 10^{10}\text{ per m}^3$ . For the sky transmission from this layer up to a range of $250\text{ km}$ , the critical frequency of the layer is:

A

2 Hz

B

2.7 Hz

C

2.78 kHz

D

2.7 MHz

Accepted Answer

2.7 MHz

Answer

2 Hz

Answer

2.7 Hz

Answer

2.78 kHz

AIIMS 2018 Physics Frequency Calculations MCQ Question

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