Physics in Depth

Image source : Physics Forums In \(_{Z}X^A\), Z is the number of protons, A is the atomic mass number (i.e., sum of number of protons and number of neutrons) and (A-Z) gives the number of neutrons. Calculate the binding energy per nucleon of 26 Fe 56 . Atomic mass of 26 Fe 56 is 55.9349 u and that of 1 H 1 is 1.00783 u. Mass of 0 n 1 = 1.00867 u and 1 u = 931 MeV. Solution: Given, mass of 26 Fe 56 , M = 55.9349 u mass of 1 H 1 i.e., mass of proton, m p = 1.00783 u mass of 0 n 1 , m n = 1.00867 u 1 u = 931 MeV binding energy per nucleon, \(\Delta E_{ben}\) = ? The relation to find the binding energy (when the mass is in atomic mass unit (u)) is, \[\Delta E_{be}=\Delta m \times 931\] Let's find \(\Delta m\) which is the mass defect, \[\begin{align*} \Delta m &=\text{theoretical mass of Fe nucleus} - \text{observed mass of Fe nucleus}\\ &=[Zm_p +(A-Z) m_n] - M\\ &=[26 \times 1.00783 ...

AC Circuit Problems — Physics AC Circuit Problems Physics  ·  Alternating Current Nikola Tesla Image source: Wikipedia Problems 1. RC Circuit — Voltage & Phase 2. LCR Series — Current, Phase & Power 3. LCR — Phase Shift 4. Coil Inductance from Two Frequencies 5. LR Circuit — Power Consumed 6. Coil + External Resistance 7. Solenoid Internal Resistance 8. RMS Value & Frequency from Equation 9. LCR — Voltage Across Resistor 10. RC Circuit — Voltages Across R & C 11. Resonance & Quality Factor 12. LR Circuit — Voltage & Frequency 13. Reducing Current with Added Resistance 1 A circuit consists of a capacitor of 2μF and a resistor of 1000Ω. An alternating emf of 12 V and frequency 50 Hz is applied. Find the voltage across the capacitor an...

Warning! The questions below are frequenty asked questions in NEB examination. Please follow the syllabus thoroughly. Every chapter and topic of your textbook is important. This questions are only for practice. Mechanics Define moment of inertia. Derive an expression for the moment of inertia of thin uniform rod about an axis through its center and perpendicular to its length. Derive a relation between the torque and angular acceleration in case of a rigid body. State the conservation of angular momentum. Derive the relation between torque and angular momentum. Write the physical significance of moment of inertia. Show that K.E. = \(\frac{1}{2} I \omega^2\) where the symbols have their usual meanings. Define simple harmonic motion. Show that the bob of a simple pendulum may move with simple harmonic motion and find its time period. Find an expression for the energy of particle in SHM...

Electromagnetic Induction Problems — Physics Electromagnetic Induction Problems Physics  ·  EMI, Inductance & Transformers Problems 1. Induced EMF from Flux Equation 2. Moving Conductor in Magnetic Field 3. Charge through Rotating Coil 4. Aircraft Wing EMF (Vertical B) 5. Self Inductance of Solenoid 6. Energy Stored in Circular Coil 7. Dynamo Conductor EMF 8. Aircraft Wing EMF (Dip Angle) 9. Rotating Rectangular Coil — Max EMF 10. Small Loop inside Solenoid 11. Mutual Inductance of Two Coils 12. Transformer — Output Voltage & Primary Current 13. Rotating Wheel — Rate of Rotation 14. Step-Down Transformer 1 The magnetic flux passing perpendicular to the plane of coil is given by φ = 4t 2 +5t+2 where φ is in weber and t is in second. Calculate the magnitude of instantaneous emf i...

Magnetic Effects of Current Problems — Physics Magnetic Effects of Current Problems Physics  ·  Electromagnetism, Galvanometers & Fields Problems 1. Galvanometer Deflection Ratio 2. Magnetic Force on Free Electrons 3. Self-Supporting Suspended Wire 4. Field Along Axis of Circular Coil 5. Angle with Magnetic Field Vector 6. Conductor inside Solenoid 7. Current and Voltage Sensitivities 8. Spring-Suspended Transverse Wire 9. Zero Net Force Position Between Wires 10. Flux Density for Orbital Electron 11. Flat Circular Coil Center Induction 12. Rotating Alpha Particle Field 13. Axial Point Field Scaling 1 Two galvanometers, which are otherwise identical, are fitted with different coils. One has a coil of 50 turns and resistance 10 Ω while the other has 500 turns and a resistance of 600 Ω...