GATE (Graduate Aptitude Test in Engineering) Physics: Questions 85  88 of 622
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Question number: 85
» Solid State Physics » Diffraction Methods for Structure Determination
Appeared in Year: 2014
Write in Short
Neutrons moving with speed are used for the determination of crystal structure. If the Bragg angle for the first order diffraction is , the interplanar spacing of the crystal is .
(Given: )
Question number: 86
» Electromagnetic Theory » Interference
Appeared in Year: 2014
Question
In an interference pattern formed by two coherent sources, the maximum and the minimum of the intensities are and , respectively. The intensities of the individual waves are –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 87
» Electronics » Bipolar Junction Transistors
Appeared in Year: 2015
Write in Short
In the simple current source shown in the figure, and are identical transistors with current gain and .
The current is ________ (upto two decimal places)
Question number: 88
» Mathematical Physics » Fourier Analysis
Appeared in Year: 2015
Question
The Heaviside function is defined as,
And its Fourier transform is given by . The Fourier transform of, is –
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  0 
