AIEEE 2006 | Dual Nature of Radiation Question 165 | Physics

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

AIEEE 2006 Physics - Dual Nature of Radiation Question 156 English Option 1

AIEEE 2006 Physics - Dual Nature of Radiation Question 156 English Option 2

AIEEE 2006 Physics - Dual Nature of Radiation Question 156 English Option 3

AIEEE 2006 Physics - Dual Nature of Radiation Question 156 English Option 4

AIEEE 2005

MCQ (Single Correct Answer)

-1

If the kinetic energy of a free electron doubles, it's deBroglie wavelength changes by the factor

$$2$$

$${1 \over 2}$$

$${\sqrt 2 }$$

$${1 \over {\sqrt 2 }}$$

AIEEE 2005

MCQ (Single Correct Answer)

-1

A photocell is illuminated by a small bright source placed $$1$$ $$m$$ away. When the same source of light is placed $${1 \over 2}$$ $$m$$ away, the number of electrons emitted by photo-cathode would

increases by a factor of $$4$$

decreases by a factor of $$4$$

increases by a factor of $$2$$

decreases by a factor of $$2$$

AIEEE 2004

MCQ (Single Correct Answer)

-1

The work function of a substance is $$4.0$$ $$eV.$$ The longest wavelength of light that can cause photo-electron emission from this substance is approximately.

$$310$$ $$nm$$

$$400$$ $$nm$$

$$540$$ $$nm$$

$$220$$ $$nm$$

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