AIPMT 2001 | Dual Nature of Radiation and Matter Question 78 | Physics

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emitted per second, will be

remain same

four times

two times

one-fourth

AIPMT 2001

MCQ (Single Correct Answer)

-1

In Thomson mass spectrograph $$\overrightarrow E \bot \overrightarrow B $$ then the velocity of electron beam will be

$${{\left| {\overrightarrow E } \right|} \over {\left| {\overrightarrow B } \right|}}$$

$$\overrightarrow E \times \overrightarrow B $$

$${{\left| {\overrightarrow B } \right|} \over {\left| {\overrightarrow E } \right|}}$$

$${{{{\overrightarrow E }^2}} \over {{{\overrightarrow B }^2}}}$$

AIPMT 2001

MCQ (Single Correct Answer)

-1

Which one among the following shows particle nature of light?

photo electric effect

interference

refraction

polarization.

AIPMT 2000

MCQ (Single Correct Answer)

-1

By photoelectric effect, Einstein proved

E = h$$\upsilon $$

K.E. = $${1 \over 2}$$ mv²

E = mc²

E = $${{ - Rh{c^2}} \over {{n^2}}}$$

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