I vs i in Photon Model

Q. Light of wavelength 0.6 mm from a sodium lamp falls on a photo cell and causes the emission of photoelectrons for which the stopping potential is 0.5 V. With light of wavelength 0.4 mm from a mercury lamp the stopping potential is 1.5 V. Then, the work function in eV of the photocell surface is

Q.

If intensity of incident light is increased in PEE then which of the following is true

1. Maximum K.E. of ejected electron will increase

2. Stopping potential will decrease

3. Work function will remain unchanged

4. Maximum K.E. of ejected electron will decrease

Q. The number of ejected photoelectrons increases with increase in ______ of light.

1. intensity
2. wavelength
3. frequency
4. None of these

Q. Why is light of shorter wavelength more effective for photoelectric effect

Q.

A photodiode is used preferably in

1. in forward bias condition

2. to increase voltage

3. to convert electrical energy into light

4. in reverse bias condition

Q.

In practical experiments of photo electric effect the total number of photo electrons coming out is less than 1% of the total number of photons falling on the plate.

Will the photo current increase on increasing intensity of the light source?

1. True

2. False

Q.

If intensity of incident light is increased in PEE then which of the following is true

1. Maximum K.E. of ejected electron will increase

2. Work function will remain unchanged

3. Stopping potential will decrease

4. Maximum K.E. of ejected electron will decrease

Q.

A photodiode is used preferably in

1. in forward bias condition

2. to increase voltage

3. to convert electrical energy into light

4. in reverse bias condition

Q. Assertion :In photoelectric effect, at stopping potential emission of photo-electrons is stopped. Reason: Increases in intensity of given light increases the kinetic energy of photo-electron.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Can X-rays be used for photoelectric effect?

Q.

In practical experiments of photo electric effect the total number of photo electrons coming out is less than 1% of the total number of photons falling on the plate.

Will the photo current increase on increasing intensity of the light source?

1. True

2. False

Q. find th maximum energy that β particle can have in the following decay {}_8^{19}O to {}_9^{19}F+{}_{-1}^0e+ ν

Q. If the operating voltage of an X-ray tube is increased

1. X-ray wavelength limit on the maximum side increases
2. X-ray wavelength limit on the minimum side decreases
3. X-ray intensity increases
4. X-ray intensity decreases

Q. Which of the following condition is encountered if two packets are transmitted over a medium at the same time?

1. Collision
2. Contention
3. Synchronous
4. Asynchronous

Q.

(a) An X-raytube produces a continuous spectrum of radiation with its shortwavelength end at 0.45 Å. What is the maximum energy of aphoton in the radiation?

(b) Fromyour answer to (a), guess what order of accelerating voltage (forelectrons) is required in such a tube?

Q. on increasing intensity number of photons increased but the energy on each photon is same then suppose intially no photons is 100 and energy is 500 on increasing intensity , no of photons increased to 200 and energy to 1000 but energy of each photon is 5 which remain same but the total energy increased by 500 , but we also know that energy is independent of intensity so , how energy increased on increasing intensity , , , , i m confuse

Q.

Which of the following statements is correct

1. The current in a photocell increases with increasing frequency of light

2. The photocurrent is proportional to applied voltage

3. The photocurrent increases with increasing intensity of light

4. The stopping potential increases with increasing intensity of incident light

Q.

Which of the following statements is correct

1. The photocurrent increases with increasing intensity of light

2. The current in a photocell increases with increasing frequency of light

3. The photocurrent is proportional to applied voltage

4. The stopping potential increases with increasing intensity of incident light