2078-10-20
दाङ, नेपाल।
वरषीय सुशील भणडारीले आफनै गाउँमा सफलतापूरवक
सवचालित कार बनाएका छन ।दिएको जानकारी अनुसार
कारमा सुशीलले समाचार अधिकारीहरूलाई अनय कचचा
पदारथ जसता उपलबधयसको कषमता लगभग 15-20 किमी
/ घणटा छ। यो परियोजनाले उनलाई करिब रु.95,000
अवधि-चार महिना; भणडारी भनछन, ‘ किनन सकने गरी थप गरन
सकौं कम मूलयमा।”
Here, the given equation of parabola is y2= 8x.
The equation of tangent to the parabola y2=8x is,
y= mx + 2/m
This tangent passes through the point (-2, 3)
So, 3 = -2m + 2/m
or, 3m + 2m2 = 2
or, 2m2+3m - 2= 0
or, 2m2 + (4 - 1)m -2 = 0
or, 2m2 + 4m - m - 2 = 0
or, 2m(m + 2) - 1(m+2) = 0
or, (m + 2) (2m - 1) = 0
Either, Or,
m = -2 m = 1/2
Required angle is,
The answer is A
In the depletion layer, electrons combine with holes producing charge density so that region is depleted of charge carriers but it has charge density .
Conclusion: Neutral but still having non zero charge density .
