1
GATE ECE 2017 Set 2
Numerical
+1
-0
A two wire transmission line terminates in a television set. The VSWR measured on the line is 5.8. The percentage of power that is reflected from the television set is
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2
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.6
Standard air filled rectangular waveguides of dimensions a = 2.29cm and b = 1.02cm are designed for radar applications. It is desired that these waveguides operate only in the dominant $$T{E_{10}}$$ mode with the operating frequency at least 25% above the cut-off frequency of the $$T{E_{10}}$$ mode but not higher than 95% of the next higher cutoff frequency. The range of the allowable operating frequency f is
A
$$8.19\,\,GHz\,\, \le \,\,f\,\, \le \,\,13.1\,\,GHz$$
B
$$8.19\,\,GHz\,\, \le \,\,f\,\, \le \,\,12.45\,\,GHz$$
C
$$6.55\,\,GHz\,\, \le \,\,f\,\, \le \,\,13.1\,\,GHz$$
D
$$1.64\,\,GHz\,\, \le \,\,f\,\, \le \,\,10.24\,\,GHz$$
3
GATE ECE 2017 Set 2
Numerical
+2
-0
The permittivity of water at optical frequencies is $$1.75{\varepsilon _0}$$. It is found that an isotropic light source at a distance d under water forms an illuminated circular area of radius $$5m$$, as shown in the figure. The critical angle is $${\theta _c}$$ GATE ECE 2017 Set 2 Electromagnetics - Miscellaneous Question 1 English

The value of $$d$$ (in meter) is ______ .

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4
GATE ECE 2017 Set 2
Numerical
+2
-0
For a particular intensity of incident light on a silicon pn junction solar cell, the photocurrent density (JL) is 2.5 mA/cm2 and the open-circuit voltage (V$$_{oc}$$) is 0.451 V. consider thermal voltage (V$$_T$$) to be 25 mV. If the intensity of the incident light is increased by 20 times, assuming that the temperature remains unchanged. V$$_{oc}$$ (in volts) will be ______.
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