Various representations are used to represented motion of any object like pictorial representation, graphs, and verbal representation etc. The branch of mechanics which studied the motion of an object is called kinematics. It describes the concept of motion with graphical representation of its basic term like displacement, velocity, speed, acceleration etc.  And motion equation which Read more about Kinematic Equations for Uniformly Accelerated Motion[…]

In spite of our best efforts we could not find a fixed point with respect to which we should study absolute rest and absolute motion. So, the study of relative rest and relative motion assumes importance. Consider two cars A and B running parallel to each other on same road with same velocities. No doubt Read more about Relative Velocity[…]

V(t) = Vm sin ωt . . Where, . i(t) = Im sin ωt And P(t) = v(t) i(t) P(t) = Vm sin ωt Im sin ωt . Hence, average power is . .It is clear that if current or voltage waveform has a frequency of 50 Hz then power waveform has a frequency of Read more about Voltage Source across Resistor[…]

V(t) = ωL Im cos ωt V(t) = XLIm cos ωt Where; XL = ωL; XL is known as inductance of circuit and has a unit of “ohm” V(t) = XLIm sin (ωt + 90⁰) And instantaneous power p(t) = v (t) * i(t) = Vm cos ωt Im sin ωt So average power is Read more about Voltage Source across Inductor[…]

If the particle moves in the circle with a uniform speed, we call it a uniform circular motion. In this case, dv/dt = 0 and equation gives . Thus, the acceleration of the particle is in the direction of , that is, towards the centre. The magnitude of the acceleration is α = ω²r . Read more about Uniform Circular Motion[…]

When light travels from an optically denser medium to a rarer medium at the interface, it is partly reflected back in to the same medium and partly refracted to the second medium. This reflection is called the internal reflection. When a ray of light enters from a denser medium to a rarer medium. It bends Read more about Total Internal Reflection[…]

. . . Where, and is known as capacitive reactance i (t) = Im sin (ωt + 90⁰) Instantaneous power p (t) = v(t) i(t) = Vm sinωt Im cos ωt . Average power . Now vector diagrams are drawn below:Hence in a capacitor current leads to voltage by 90° (or voltage lags to currents Read more about Source across Capacitor[…]

The applied voltage V divides into three parts, VL (across L), VC (across C) and VR (across R) such that  We knowBy KVL, V = VR + j (VL – VC) V = √ (V²R + (VL – VC)²) VL  Voltage across Inductor VR Voltage across Resistor VC  Voltage across Capacitor The impedance of the Read more about Series LCR Circuit[…]

RMS Value: RMS value is defined on the basis of the heating effect of the waveform. The ac voltage at which heat produced in an ac circuit is equal to heat produced in the dc circuit is called as Vrms, provided both ac circuit ac circuit and dc circuit have equal value of resistance and Read more about RMS Value & Average Value[…]

Sometimes we are interested to replace a relatively complicated resistor combinations with a single equivalent resistor, especially when we are not interested in the current, Voltage or power associated with any of the individual resistors in the combinations. All the current, voltage and power relationships in the remainder of the circuit will be unchanged. Consider Read more about Resistors in Series and Parallel[…]