Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JIPMER 2008
Exam
JIPMER
Year
2008
Subject
Physics
Chapter
Current Electricity

JIPMER 2008 · Physics · Current Electricity

Flash light equipped with a new set of batteries, produces bright...

Flash light equipped with a new set of batteries, produces bright white light. As the batteries wear out

Options

  1. Athe light intensity gets reduced with no change in its colour
  2. Blight colour changes first to yellow and then red with no change in intensity
  3. Cit stops working suddenly while giving white light
  4. Dcolour changes to red and also intensity gets reduced

Correct answer

D. colour changes to red and also intensity gets reduced

Step-by-step solution

As batteries wear out, temperature of filament of flash light attains lesser value, therefore intensity of radiation reduces. Also dominating wavelength (λm)\left(\lambda_m\right) in spectrum, which is the red colour, increases.
Practice Current Electricity on Quantrex Academy →

More from Current Electricity

A potentiometer wire of 400\ cm length has a resistance of 20\ Ω . It is connected in… MHT CET Medical 2026In the following figure current I equal to MHT CET Medical 2026The range of voltmeter is 10\ V and its resistance is 50\ Ω . To convert it to a… MHT CET Medical 2026When a galvanometer is shunted with a 2\ Ω resistance, the deflection is reduced to… MHT CET Medical 2026A galvanometer can be converted into a voltmeter of certain range by connecting a… MHT CET Medical 2026A resistance is to be measured using a meter bridge; the student chooses the standard… MHT CET Medical 2026Which of the following statements is FALSE? A. In a balanced Wheatstone bridge, if the… MHT CET Medical 2026A potentiometer wire has length 4 m and resistance 8\ Ω . The resistance that must be… MHT CET Medical 2026 Full Current Electricity list All JIPMER PYQs