List of top Physics Questions asked in BHU PET

Which of the following is an optically active substance?
The radius of the first zone in a zone plate of focal length 40 cm for light of wavelength 4000 Å is:
If a particle is fixed on a rotating frame of reference, the fictitious force acting on the particle will be:
The acceleration of a frame of reference, fixed on the earth’s surface at the equator and rotating with the earth, once a day will be:
The ratio of isobaric volume expansivity and isothermal compressibility is given as:
States of thermodynamic equilibrium can be described in terms of:
During a quasi-static process:
One liter atmosphere equals:
At constant temperature, the internal energy of a Van der Waals gas:
At \( 4^\circ C \) for water, \( C_P = C_V \) because:
In the inversion curve for a gas, in the region of cooling:
Mathematical formulation of the first law contains the idea of:
Specific heat of saturated steam is:
If a black body radiation enclosure expands, so that its volume becomes 64 times, the temperature of the enclosure becomes:
For a two-dimensional free electron gas, the electron density \(n\) and Fermi energy \(E_F\) are related as:
Which of the following is a Hermitian operator?
The nuclei \( ^{13}_6C \) and \( ^{14}_7N \) can be described as:
The particle \( x \) in the following nuclear reaction is:
\[ ^9_4Be + ^4_2He \rightarrow ^{12}_6C + x \]
If \( M \) is the mass of nucleus and \( A \) its atomic mass, then the packing fraction is:
200 MeV of energy is obtained in the fission of one nucleus of \( ^{235}U \). A reactor is generating 1000 kW power. The rate of nuclear fission in the reactor is:
For fission to take place, neutrons must have:
The beam profile of a laser operating in \(TEM_{00}\) (fundamental mode) is:
The activity of a sample of radioactive material is \( A_1 \) at time \( t_1 \) and \( A_2 \) at time \( t_2 \) (\( t_2>t_1 \)). Its mean life is \( T \), then:
The following transitions lead to the two components of sodium yellow line. The ratio of intensities of the two lines \(b\) and \(a\), \(I_b : I_a\), is:
The separation between adjacent energy levels of a normal multiplet is in the ratio \(3:5\). According to the Lande interval rule, what is the value of \(L\)?