| ⇦ | 
| ⇨ |
The potential difference applied to an X-ray tube is 5 kV and the current through it is 3.2 mA. The number of electrons striking the target per second is
Options
(a) 5 x 10¹⁶
(b) 1 x 10¹⁷
(c) 4 x 10¹⁵
(d) 2 x 10¹⁶
Correct Answer:
2 x 10¹⁶
Explanation:
Let n = number of electrons striking per sec.
e = 1.6 × 10⁻¹⁹ = charge on each electron
Charge per second = n × 1.6 × 10⁻¹⁹
Current = n × 1.6 × 10⁻¹⁹
3.2 × 10⁻³ = n × 1.6 × 10⁻¹⁹
n = 3.2 × 10⁻³ / 1.6 × 10⁻¹⁹ = 2 × 10¹⁶
Related Questions: - Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary
- An inclined plane of length 5.60m making an angle of 45⁰ with the horizontal is placed
- A boat of anchor is rocked by waves whose crests are 100 m apart and velocity
- In a capillary tube water raises by 1.2 mm. The height of water that will rise
- In potentiometer experiment, a cell of emf 1.25V gives balancing length of 30 cm
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary
- An inclined plane of length 5.60m making an angle of 45⁰ with the horizontal is placed
- A boat of anchor is rocked by waves whose crests are 100 m apart and velocity
- In a capillary tube water raises by 1.2 mm. The height of water that will rise
- In potentiometer experiment, a cell of emf 1.25V gives balancing length of 30 cm
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply