Explore topic-wise MCQs in Physics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

What is the energy required to ionize an H-atom from the third excited state, if ground state ionization energy of H-atom is 13.6 eV?

A. 1.5 eV
B. 3.4 eV
C. 13.6 eV
D. 12.1 eV
Answer» B. 3.4 eV
Discussion
2.

Find out the minimum energy required to take out the only one electron from the ground state of Li+?

A. 13.6 eV
B. 122.4 eV
C. 25.3 eV
D. 67.9 eV
Answer» C. 25.3 eV
Discussion
3.

The energy of characteristic X-ray is a consequence of which of the following?

A. The energy of the projectile electron
B. The thermal energy of the target
C. Transition in target atoms
D. Temperature
Answer» D. Temperature
Discussion
4.

What is the ratio of minimum to maximum wavelength in the Balmer series?

A. 5:9
B. 5:36
C. 1:4
D. 3:4
Answer» B. 5:36
Discussion
5.

The Bohr model of atoms uses Einstein s photoelectric equation.

A. True
B. False
Answer» C.
Discussion
6.

Calculate the ratio of the kinetic energy for the n = 2 electron for the Li atom to that of Be+ ion?

A. ( frac {9}{16} )
B. ( frac {3}{4} )
C. 1
D. ( frac {1}{2} )
Answer» B. ( frac {3}{4} )
Discussion
7.

The size of the atom is proportional to which of the following?

A. A
B. A<sup>1/3</sup>
C. A<sup>2/3</sup>
D. A<sup>-1/3</sup>
Answer» C. A<sup>2/3</sup>
Discussion
8.

According to the uncertainty principle for an electron, time measurement will become uncertain if which of the following is measured with high certainty?

A. Energy
B. Momentum
C. Location
D. Velocity
Answer» B. Momentum
Discussion
9.

Which source is associated with a line emission spectrum?

A. Electric fire
B. Neon street sign
C. Red traffic light
D. Sun
Answer» C. Red traffic light
Discussion