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JEE Main 20137 April
Exam
JEE Main
Year
2013
Date
7 April
Subject
Physics
Chapter
Dual Nature of Matter

JEE Main 2013 · 7 April · Physics · Dual Nature of Matter

The anode voltage of a photocell is kept fixed. The wavelength λ of...

The anode voltage of a photocell is kept fixed. The wavelength λ\lambda of the light falling on the cathode is gradually changed. The plate current I\text{I} of the photocell varies as follows :The anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is graduallyThe anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is graduallyThe anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is graduallyThe anode voltage of a photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually

Options

  1. AAt time t=0 , a car moving along a straight line has a velocity of (16 ~ms^ -1 ). It slows down with an acceleration of
  2. BAt time t=0 , a car moving along a straight line has a velocity of (16 ~ms^ -1 ). It slows down with an acceleration of
  3. CAt time t=0 , a car moving along a straight line has a velocity of (16 ~ms^ -1 ). It slows down with an acceleration of
  4. DAt time t=0 , a car moving along a straight line has a velocity of (16 ~ms^ -1 ). It slows down with an acceleration of

Correct answer

B. At time t=0 , a car moving along a straight line has a velocity of (16 ~ms^ -1 ). It slows down with an acceleration of

Step-by-step solution

As λ is increased, there will be a value of λ above which photo-electron will be cease to come out, so photo-current will becomes zero.
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