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WorksheetsThe Photoelectric effect
Total questions: 12
Worksheet time: 8mins
Name
Class
Date
1.
In the photo electric effect ---------------- fell onto a polished metal surface.
a)
electrons
b)
photons
c)
waves
d)
plutons
2.
This caused ------------------ to be emitted by the surface
a)
electrons
b)
photons
c)
waves
d)
plutons
3.
The energy of the emitted electrons was measured using a -----------------
a)
standing voltage
b)
striking voltage
c)
stopping voltage
d)
starting voltage
4.
To release an electron the energy of the photon had to be more than
a)
zero
b)
the cut off frequency
c)
the work function
d)
the cut off wavelength
5.
the energy of the photon is ---------------
a)
hf
b)
h/f
c)
hf + Φ
d)
hf - Φ
6.
The energy of the emitted electron is ------------
a)
hf
b)
h/f
c)
hf + Φ
d)
hf - Φ
7.
The energy of the emitted photon can also be worked out from the stopping voltage -----------
a)
V
b)
eV
c)
eV - Φ
d)
eV + Φ
8.
The equation for the photoelectric effect is
eV = hf - Φ
The graph of electron energy against frequency is
eV = hf - Φ
The graph of electron energy against frequency is
a)
a straight line through the origin
b)
a straight line gradient h
c)
a straight line with a positive y intercept
d)
not a straight line
9.
The cut off frequency is
a)
the highest frequency that releases electrons
b)
always in the red part of the spectrum
c)
always in the purple part of the spectrum
d)
different for different metals
10.
the wavelength of a photon can be found using
a)
λ = cf
b)
λ = hf
c)
λ = c/f
d)
λ = f/c
11.
A surface has a work function of 4 x 10⁻¹⁹ J
What is the cut off wavelength?
h = 6.6 x 10⁻³⁴ Js
c = 3 x 10⁸ ms⁻¹
What is the cut off wavelength?
h = 6.6 x 10⁻³⁴ Js
c = 3 x 10⁸ ms⁻¹
a)
6.0 x 10⁻¹⁴ m
b)
700nm
c)
5 x 10⁻⁷ m
d)
3 x 10⁻⁶ m
12.
A student has 3 lasers red, green and blue.
When the green laser is shone onto a metal surface electrons are released
When the green laser is shone onto a metal surface electrons are released
a)
the blue laser will release more electrons
b)
the red laser won't release electrons
c)
the cut-off wavelength is shorter than the wavelength of green light.
d)
the blue laser will release more energetic electrons
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