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SDSC (ISRO) Technical Assistant (Electronics): Previous Paper 2018 (Held On: 8 April 2018)

- 100 watts
- 30 watts
- 10,000 watts
- 1000 watts

Option 3 : 10,000 watts

Free

CT 1: Network Theory 1

11608

10 Questions
10 Marks
10 Mins

__Concept__:

Effective radiated power (ERP) is defined as:

ERP = G ⋅ P_{t} watts

Where, G = Gain of the Antenna

P_{t} = transmitted power

__Calculation__:

Given that, G = 30 dB and P_{t} = 10 W

Since, G(in dB) = 10 log_{10} (G)

30 = 10 log_{10} (G)

3 = log_{10} (G)

∴ G = 10^{3} = 1000

∴ ERP = G ⋅ P_{t}

= 1000 × 10

= 10,000 watts
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