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The maximum kinetic energy of a photoelectron is 3 eV. What is the stopping potential?
- a)0 V
- b)3 V
- c)9 V
- d)12 V
Correct answer is option 'B'. Can you explain this answer?
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The maximum kinetic energy of a photoelectron is 3 eV. What is the sto...
Stopping potential is given as:
V0 = Kmax / e
V0 = 3eV / e
V0 = 3 V
Therefore, the stopping potential is 3 V.
V0 = Kmax / e
V0 = 3eV / e
V0 = 3 V
Therefore, the stopping potential is 3 V.
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The maximum kinetic energy of a photoelectron is 3 eV. What is the sto...
Explanation:
To determine the stopping potential, we need to use the relation between kinetic energy and electric potential energy.
1. Relation between kinetic energy and electric potential energy:
The kinetic energy (KE) of a photoelectron is given by the equation:
KE = eV
where e is the charge of an electron (1.6 x 10^-19 C) and V is the electric potential.
2. Maximum kinetic energy of the photoelectron:
Given that the maximum kinetic energy is 3 eV, we can write:
KE = 3 eV = 3 * (1.6 x 10^-19 C) V
3. Stopping potential:
The stopping potential (V_stop) is the minimum potential needed to stop the photoelectron. At this potential, the electric potential energy is equal to the kinetic energy, resulting in a net energy of zero.
4. Equating kinetic and electric potential energy:
To find the stopping potential, we can equate the kinetic energy to the electric potential energy:
eV_stop = KE
eV_stop = 3 * (1.6 x 10^-19 C) V
5. Calculating the stopping potential:
To calculate the stopping potential, we need to divide both sides of the equation by the charge of an electron (e):
V_stop = KE / e
V_stop = (3 * (1.6 x 10^-19 C) V) / (1.6 x 10^-19 C)
V_stop = 3 V
Therefore, the stopping potential is 3 V, which corresponds to option (b).
To determine the stopping potential, we need to use the relation between kinetic energy and electric potential energy.
1. Relation between kinetic energy and electric potential energy:
The kinetic energy (KE) of a photoelectron is given by the equation:
KE = eV
where e is the charge of an electron (1.6 x 10^-19 C) and V is the electric potential.
2. Maximum kinetic energy of the photoelectron:
Given that the maximum kinetic energy is 3 eV, we can write:
KE = 3 eV = 3 * (1.6 x 10^-19 C) V
3. Stopping potential:
The stopping potential (V_stop) is the minimum potential needed to stop the photoelectron. At this potential, the electric potential energy is equal to the kinetic energy, resulting in a net energy of zero.
4. Equating kinetic and electric potential energy:
To find the stopping potential, we can equate the kinetic energy to the electric potential energy:
eV_stop = KE
eV_stop = 3 * (1.6 x 10^-19 C) V
5. Calculating the stopping potential:
To calculate the stopping potential, we need to divide both sides of the equation by the charge of an electron (e):
V_stop = KE / e
V_stop = (3 * (1.6 x 10^-19 C) V) / (1.6 x 10^-19 C)
V_stop = 3 V
Therefore, the stopping potential is 3 V, which corresponds to option (b).
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The maximum kinetic energy of a photoelectron is 3 eV. What is the stopping potential?a)0 Vb)3 Vc)9 Vd)12 VCorrect answer is option 'B'. Can you explain this answer?
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