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A voltmeter of range 2 V and resistance 300Ω cannot be converted into ammeter of range
Options
(a) 1A
(b) 1mA
(c) 100mA
(d) 10mA
Correct Answer:
1mA
Explanation:
Ig = (2 / 300) A = (2 / 300) × 1000 mA = (20 / 3) mA
Therefore, Ig = 6.67 mA
As range of ammeter cannot be decreased but can be increased only, therefore, the instrument cannot be converted to measure the range 1 mA.
Related Questions: - Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV.
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Excitation energy of a hydrogen like ion, in its first excitation state, is 40.8 eV.
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
- If ∆U and ∆W represent the increase in internal energy and work done by the system
- Light with an energy flux of 25×10⁴ Wm⁻² falls on a perfectly reflecting surface
- Two planets at mean distances d₁ and d₂ from the sun have their frequencies n₁ and n₂
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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