The photoelectric cut-off voltage in a certain experiment is $1.5 \;V. $ What is the maximum kinetic energy of photoelectrons emitted?
The photoelectric cut-off voltage in a certain experiment is $1.5 \;V. $ What is the maximum kinetic energy of photoelectrons emitted?
Maximum kinetic energy,
$K_{max} = eV_o$
Putting values and solving
$=2.4 \times 10^{-19}\; J$
Similar Questions
Match the column
$(A)$ Hallwachs $\&$ Lenard
$(P)$ Transformers
$(B)$ Franck-Hertz
$(Q)$ Microwave
$(C)$ Klystron valve
$(R)$ Quantization of energy levels
$(D)$ Nicola Tesla
$(S)$ Photoelectric effect
Match the column
| $(A)$ Hallwachs $\&$ Lenard | $(P)$ Transformers |
| $(B)$ Franck-Hertz | $(Q)$ Microwave |
| $(C)$ Klystron valve | $(R)$ Quantization of energy levels |
| $(D)$ Nicola Tesla | $(S)$ Photoelectric effect |
Which of one is correct
Which of one is correct
A $10\, kW$ transmitter emits radio waves of wavelength $500\, m$. The number of photons emitted per second by the transmitter is of the order of
A $10\, kW$ transmitter emits radio waves of wavelength $500\, m$. The number of photons emitted per second by the transmitter is of the order of
- [AIEEE 2012]
A radiation of energy $'E'$ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is $( C =$ Velocity of light $)$
A radiation of energy $'E'$ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is $( C =$ Velocity of light $)$
- [AIPMT 2015]
A sensor is exposed for time $t$ to a lamp of power $P$ placed at a distance $l$. The sensor has a circular opening that is $4d$ in diameter. Assuming all energy of the lamp is given off as light, the number of photons entering the sensor if the wavelength of light is $\lambda $ is $(l >> d)$
A sensor is exposed for time $t$ to a lamp of power $P$ placed at a distance $l$. The sensor has a circular opening that is $4d$ in diameter. Assuming all energy of the lamp is given off as light, the number of photons entering the sensor if the wavelength of light is $\lambda $ is $(l >> d)$