1. The two-dot charges are in air medium.
What is doing?
The potential energy of Earth is zero- Explain.
What is the Coulomb force between the charges?
At which point between the charges is the electric intensity zero? Calculate your answer.
2. A closed coil with 100 cm2 100 \mathrm{~cm}^{2} 100 cm2 average area and 200 torsions is perpendicular to a magnet of 0.2×10−4 0.2 \times 10^{-4} 0.2×10−4 tesla. It is rotated 180∘ 180^{\circ} 180∘ in 110 s−%180∘ \frac{1}{10} \mathrm{~s}-\% 180^{\circ} 101 s−%180∘.
What is a semiconductor?
How is the magnetic nature of matter created naturally?
What is the average value of the electromotive force of the coil?
If the coil is moved 360∘ 360^{\circ} 360∘ with the same velocity, how will the current flow change?
3. →92U235+0nI→[92U236]∗→s6BaIAI+36K92+ Neutron + \rightarrow_{92} U^{235}+{ }_{0} n^{I} \rightarrow\left[{ }_{92} U^{236}\right]^{*} \rightarrow{ }_{s 6} B a^{I A I}+{ }_{36} K^{92}+\text { Neutron }+ →92U235+0nI→[92U236]∗→s6BaIAI+36K92+ Neutron +Energy
Here, 92U235=236.0526 { }_{92} U^{235}=236.0526 92U235=236.0526 a.m.u, 56Bls1=140.9139 { }_{56} B^{l s 1}=140.9139 56Bls1=140.9139 a.m.u, 36Kr92=91.8973 { }_{36} K r^{92}=91.8973 36Kr92=91.8973 a.m.u and 0n1=1.0087 _{0} n^{1}=1.0087 0n1=1.0087 a.m.u, Tl2=450÷108Y \frac{T_{l}}{2}=450 \div 10^{8} \mathrm{Y} 2Tl=450÷108Y.
What is nucleon?
The total energy of the electrons in a molecule is always negative- Explain.
How many neutrons will be released in the reaction above?
How much energy is released from the reaction?
4.
What is Hall Effect?
What does "Dhaka's deviation is 31∘d 31^{\circ} \mathrm{d} 31∘d " mean?
Find the value of magnetic field at point P P P caused by XY X Y XY wire.
"The magnetic field of either P \mathbf{P} P or Q \mathbf{Q} Q is greater than the other"- Justify the statement.
5. Two electrons are moving with 0.866C 0.866 \mathrm{C} 0.866C and 0.99C 0.99 \mathrm{C} 0.99C velocity. The mass of electrons is 9.1×10−31 kg 9.1 \times 10^{-31} \mathrm{~kg} 9.1×10−31 kg.
What is work function?
If the velocity of electron and proton is equal, why is the De Broglie wavelength of the electron higher?
Find the dynamic mass of the first electron?
The kinetic energy of the first electron is less than the second electron- Explain.