Question 41 : Ground waves are most effective when _________
1. it is above about 20MHZ
2. it is below about 3MHz
3. it is at microwave frequencies
4. usually in the UHF range
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Question 42 : An antenna has 'gain' as compared to ________
1. Helical antenna
2. Marconi antenna
3. Vertically polarized radiator
4. Isotropic radiator
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Question 43 : What is speed of radio waves in free space?
1. 3 x 10⁶ m/s
2. 3 x 10⁹ m/s
3. 300 x 10⁶ m/s
4. 300 x 10⁹ m/s
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Question 44 : What effect will be seen on the resistance of a wire if we increases the frequency?
1. it will also increase
2. it starts to decrease
3. it will remain same
4. it starts changing periodically
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Question 45 : When analyzing a transmission line, its inductance and capacitance are considered as _________
1. distributed
2. lumped
3. equal reactances
4. equal impedances
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Question 46 : FSK stands for ________
1. Frequency Segregation Keying
2. Frequency Section Keying
3. Frequency Signal Keying
4. Frequency Shift Keying
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