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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
- The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap
- A magnet of length 10 cm and magnetic moment 1 A-m² is placed
- A capacitor of 10 µF charged upto 250 volt is connected in parallel with another
- For CE transistor amplifier, the audio signal voltage across the collector resistance
- When 10¹⁹elecrons are removed from a neutral metal plate through some process,
Topics: Electrostatics (146)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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