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The mean free path of electrons in a metal is 4 x 10⁻⁸ m. The electric field which can give on an average 2 eV energy to an electron in the metal will be in units of V/m
Options
(a) 5 x 10⁻¹¹
(b) 8 x 10⁻¹¹
(c) 5 x 10⁷
(d) 8 x 10⁷
Correct Answer:
5 x 10⁷
Explanation:
E = V / d = 2 / 4 x 10⁻⁸
0.5 x 10⁸ = 5 x 10⁷ Vm⁻¹
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A filament bulb (500W,100V) is to be used in a 230V main supply. When a resistance
- A plane polarised light is incident normally on a tourmaline plate. Its E vector make
- Two particles P and Q start from origin and execute simple harmonic motion along X-axis
- A tuning fork frequency 512 Hz is vibrated with a sonometer wire and 6 beats per second
- Under constant pressure, graph between P and 1/V is a
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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