AIPMT 2007 | Dual Nature of Radiation and Matter Question 68 | Physics

AIPMT 2007

MCQ (Single Correct Answer)

-1

A beam of electron passes undeflected through mutually perpendicular electric and magnetic fields. If the electric field is switched off, and the same magnetic field is maintained, the electrons move

in a circular orbit

along a parabolic path

along a straight line

in an elliptical orbit.

AIPMT 2007

MCQ (Single Correct Answer)

-1

Monochromatic light of frequency 6.0 $$ \times $$ 10¹⁴ Hz is produced by a laser. The power emitted is 2 $$ \times $$ 10^$$-$$3 W. The number of photons emitted, on the average, by the source per second is

5 $$ \times {10^{16}}$$

5 $$ \times {10^{17}}$$

5 $$ \times {10^{14}}$$

5 $$ \times {10^{15}}$$

AIPMT 2006

MCQ (Single Correct Answer)

-1

A photocell employs photoelectric effect to convert

change in the frequency of light into a change in the electric current

change in the frequency of light into a change in electric voltage

change in the intensity of illumination into a change in photoelectric current

change in the intensity of illumination into a change in the work function of the photocathode.

AIPMT 2006

MCQ (Single Correct Answer)

-1

When photons of energy h$$\upsilon $$ fall on an aluminimum plate (of work function E₀), photoelectrons of maximum kinetic energy K are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

K + h$$\upsilon $$

K + E₀

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