Physics Calculators (Page 22)
Velocity, mechanics, energy, electricity and physics tools.
Transformer Ratio Calculator
Enter primary/secondary turns (Np, Ns), primary voltage and current to compute turns ratio n=Np/Ns, voltage ratio, current ratio, Vs and Is. Np=1000, Ns=100, Vp=100, Ip=1 → Vs=10 V, Is=10 A (step-down).
Ampere Force Calculator
Compute the magnetic force on a current-carrying wire (F = ILB·sinθ).
Self-Inductance Calculator
Enter coil turns, flux per turn and current to compute self-inductance L=N·Φ/I. N=100, Φ=0.0001 Wb, I=0.5 A → L≈0.02 H.
Mutual Inductance Calculator
Enter the linked flux and primary current (or both self-inductances) to compute mutual inductance between two coils.
Magnetic Torque Calculator
Enter turns, current, area and field (with angle) to compute the torque τ = N·I·A·B·sinθ on a current loop in a magnetic field.
Back EMF Calculator
Compute the back electromotive force of an inductor (ε = −L·di/dt).
Terminal Voltage Calculator
Enter EMF, current, internal resistance and charge/discharge mode to compute terminal voltage V=ε∓Ir, voltage drop Ir and internal power loss P=I²r. ε=12 V, I=2 A, r=0.5 Ω → discharge V=11 V, charge V=13 V.
Relativistic Velocity Addition Calculator
Enter observer speed v, object speed u' and light speed c to compute u=(v+u')/(1+vu'/c²). v=0.5c, u'=0.5c → u≈0.8c (not 1.0c); v=c, u'=c → u=c (light-speed limit).
Relativistic Energy Calculator
Enter mass m and velocity v to compute total energy E=γmc², rest energy E0=mc² and kinetic energy K=(γ−1)mc². v=0.9c, m=1 kg → E≈2.29×10¹⁷ J, K≈1.94×10¹⁷ J.
Capacitor Combination Calculator
Enter up to 3 capacitors and the connection mode to compute the equivalent capacitance. Series 1μF+1μF → 0.5μF; parallel 1μF+2μF+3μF → 6μF.
Magnetic Field of a Straight Wire Calculator
Enter current I and distance r to compute the magnetic field B=μ₀I/(2πr). I=10 A, r=0.05 m → B≈4.0×10⁻⁵ T (≈0.4 G).
Q Factor (Quality Factor) Calculator
Enter up to 3 frequencies (f0, f1, f2) to compute the quality factor Q=f0/(f2−f1). Q=100, f0=1 kHz, BW=10 Hz; higher Q means narrower bandwidth and lower loss.