GATE XE · 2019 · XE-C
Question 19: Properties and Applications of Materials
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Question 19
XE-CNAT2 marksNeeds review
The de Broglie wavelength of an electron accelerated across a 300 kV potential in an electron microscope is _____ ×10⁻¹² m. Ignore relativistic effects. (round off to 2 decimal places)
(Given: Planck’s constant = 6.63 × 10⁻³⁴ J s, electron rest mass = 9.1 × 10⁻³¹ kg, electron charge = 1.6 × 10⁻¹⁹ C)
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2019XE-C
GATE XE 2019 · Paper 1
Engineering Sciences · Original paper archive
- Section
- Section XE-C
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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