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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
Related Questions: - A certain current on passing through a galvanometer produces a deflection
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Topics: Electrostatics
(146)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A certain current on passing through a galvanometer produces a deflection
- Ohm’s law valid
- An aicraft executes a horizontal loop of radius 1 km with a speed of 900 kmh⁻¹
- An electric dipole is placed at an angle 30°with an electric field intensity 2×10⁵N/C.
- The radius of a ball is(5.2±0.2)cm.The percentage error in the volume of the ball
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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