KC+CET PYQs for De Broglie Hypothesis with Solutions: Practice KCET Previous Year Questions

Updated on - Feb 16, 2026

De Broglie Hypothesis is an important topic in the Physics section in KCET exam. Practising this topic will increase your score overall and make your conceptual grip on KCET exam stronger.

This article gives you a full set of KCET PYQs for De Broglie Hypothesis with explanations for effective preparation. Practice of KCET Physics PYQs including De Broglie Hypothesis questions regularly will improve accuracy, speed, and confidence in the KCET 2026 exam.

KCET PYQs for De Broglie Hypothesis with Solutions

1.
The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is
- $0.3 A˚$
- $3.3 A˚$
- $6.26 A˚$
- $10 A˚$
View Solution
2.
The de Broglie wavelength of an electron in the first Bohr orbit is
- equal to one fourth the circumference of the first orbit
- equal to half the circumference of the first orbit
- equal to twice the circumference of the first orbit
- equal to the circumference of the first orbit
View Solution
3.
If we consider an electron and a photon with the same de-Broglie wavelength, then they will have the same
- Velocity
- Momentum
- Angular momentum
- Energy
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4.
A hot filament liberates an electron with zero initial velocity. The anode potential is $1200\,V$. The speed of the electron when it strikes the anode is
- $1.5 \times 10^5 \,ms^{-1}$
- $2.5 \times 10^6 \,ms^{-1}$
- $2.1 \times 10^7 \,ms^{-1}$
- $2.5 \times 10^8 \,ms^{-1}$
View Solution
5.
The de Broglie wavelength of a proton (charge = $1.6\times10^{-19}C$ mass = $1.6\times10^{-27} kg)$ accelerated through a p.d of $1\, kV$ is
- $0.9\, nm$
- $7\,?$
- $0.9 \times10^{-12}\, m$
- $600\, ?$
View Solution
6.
The photoelectric threshold wavelength for silver is $$\lambda_{0}$$ The energy of the electron ejected from the surface of silver by an incident wavelength $\lambda (\lambda <\lambda _0)$
- $hc\left(\lambda_{0}-\lambda\right)$
- $\frac{hc}{\lambda_{0}-\lambda}$
- $\frac{h}{c} \left(\frac{\lambda_{0}-\lambda}{\lambda\lambda_{0}}\right)$
- $hc \left(\frac{\lambda_{0}-\lambda}{\lambda\lambda_{0}}\right)$
View Solution

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KCET PYQs for De Broglie Hypothesis with Solutions: Practice KCET Previous Year Questions

KCET PYQs for De Broglie Hypothesis with Solutions

1.
The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is

2.
The de Broglie wavelength of an electron in the first Bohr orbit is

3.
If we consider an electron and a photon with the same de-Broglie wavelength, then they will have the same

4.
A hot filament liberates an electron with zero initial velocity. The anode potential is $1200\,V$. The speed of the electron when it strikes the anode is

5.
The de Broglie wavelength of a proton (charge = $1.6\times10^{-19}C$ mass = $1.6\times10^{-27} kg)$ accelerated through a p.d of $1\, kV$ is

6.
The photoelectric threshold wavelength for silver is \($\lambda_{0}$\) The energy of the electron ejected from the surface of silver by an incident wavelength \(\lambda (\lambda <\lambda _0)\)

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KCET PYQs for De Broglie Hypothesis with Solutions

1.The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is

2.The de Broglie wavelength of an electron in the first Bohr orbit is

3.If we consider an electron and a photon with the same de-Broglie wavelength, then they will have the same

4.A hot filament liberates an electron with zero initial velocity. The anode potential is $1200\,V$. The speed of the electron when it strikes the anode is

5.The de Broglie wavelength of a proton (charge = $1.6\times10^{-19}C$ mass = $1.6\times10^{-27} kg)$ accelerated through a p.d of $1\, kV$ is

6.The photoelectric threshold wavelength for silver is \($\lambda_{0}$\) The energy of the electron ejected from the surface of silver by an incident wavelength \(\lambda (\lambda <\lambda _0)\)

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1.
The de-Broglie wavelength associated with electron of hydrogen atom in this ground state is

2.
The de Broglie wavelength of an electron in the first Bohr orbit is

3.
If we consider an electron and a photon with the same de-Broglie wavelength, then they will have the same

4.
A hot filament liberates an electron with zero initial velocity. The anode potential is $1200\,V$. The speed of the electron when it strikes the anode is

5.
The de Broglie wavelength of a proton (charge = $1.6\times10^{-19}C$ mass = $1.6\times10^{-27} kg)$ accelerated through a p.d of $1\, kV$ is

6.
The photoelectric threshold wavelength for silver is \($\lambda_{0}$\) The energy of the electron ejected from the surface of silver by an incident wavelength \(\lambda (\lambda <\lambda _0)\)