Virtual Oscilloscope to try different waveforms and also to input your own voice.
From the seconds/div calculate the frequency of the wave and double check the value.
What is the formula or relation between time period, frequency, angular frequency?
How is Circular motion linked with Simple Harmonic Motion SHM?
What is the phase difference between Displacement, Velocity and Acceleration?
How does the amplitude of each above quantity change as the angular velocity w change?
What is the phase difference between Displacement, Velocity and Acceleration?
How does the amplitude of each above quantity change as the angular velocity w change?
What is the phase difference between Sine and Cosine curve?
What is a Rotating vector or a Phasor?
What is a Rotating vector or a Phasor?
Build the R only circuit construction as shown, plot the voltage and current graphs,
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
Change the supply voltage and frequency to see what happens to the current flow?
Connect it with your theory knowledge on R-only.
What is a Resistor?
What is the opposition due to the resistor called?
How is it related to frequency of the AC?
What is the opposition due to the resistor called?
How is it related to frequency of the AC?
Build the L only circuit construction as shown, plot the voltage and current graphs,
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
What does the mnemonic ELI tell you?
Change the supply voltage and frequency to see what happens to the current flow?
Connect it with your theory knowledge on L-only.
What is an inductor?
What is the opposition due to an inductor called?
How is it related to frequency of the AC?
Build the C only circuit construction as shown, plot the voltage and current graphs,
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
What is the phase difference between voltage and current graphs ?
(pause the animation to see the phase difference),
What does the mnemonic ICE tell you?
Change the supply voltage and frequency to see what happens to the current flow?
Connect it with your theory knowledge on C-only.
What is a Capacitor?
What is the opposition due to a Capacitor called?
How is it related to frequency of the AC?
Build the RLC in Series circuit construction as shown,
Plot the voltage across L and C elements,
What is the phase difference between V_L and V_C voltage graphs ?
(pause the animation to see the phase difference)
(pause the animation to see the phase difference)
Build the RLC in Series circuit construction as shown,
Plot the voltage across the resultant Voltage and Current,
What is the phase difference between the resultant Voltage and Current graphs?
(pause the animation to see the Approx. phase angle)
(pause the animation to see the Approx. phase angle)
From the shown R, L and C values and Supply Voltage Max and Frequency values,
Find X_L and X_C, Find tan (phi) = (X_L - X_C) / R and
find phi the angle between Voltage and Current.
Comapare the result with the above phase difference in the graphs.
Find the impedance Z, peak current i_o,
compare it with the graph current value.
(Sol: X_L = 5 pi Ohms, X_C = 10/pi Ohms,
phi = tan-1(4/3) ~ 53 deg,
Z=16. Ohms, peak current i_o = 0.6 A)
What is Resonance in AC circuits?
What oscillates in an AC circuit?
What is LC oscillations in AC circuits?
What is the Natural frequency of an AC circuit?
What is the driving frequency and driven frequency of an AC circuit?
What happens to the current value during Resonance in AC circuits?
Find out the Natural Frequency of the RLC circuit in the above,
adjust the AC source frequency to this value
and see if the current is increasing to maximum.
(Sol: Natural Frequency of RLC is 0.23 Hz)
What is Resonance?
What is Resonance in Oscillating systems such as Spring and Mass system?
Find the Natural Frequency of each of the spring mass system and show that it will oscillate with maximum displacement during Resonance?
(Sol: Use the frequency formula for spring mass system freq=(1/2 pi) sqrt(k/m)
Natural frequency of each system is 0.8 Hz, 1.1 Hz, 1.6 Hz respectively)
Charge the Capacitor with a Battery as shown.
Remove the charged Capacitor and connect it with an Inductor as shown.
What is LC oscillations in AC circuits?
Can we have RLC oscillations in AC circuits? What will be the difference?
Calculate Angular Frequency w_o, Frequency, Time Period T,
peak current i_o = C Vo w_o
(Sol: For the shown values
Angular Frequency w_o = 2 rad/s, Frequency = 0.3 Hz, Time Period T = 3.14 s,
peak current i_o = C Vo w_o = 0.1 x 9 x 2 = 1.8 A)
AC Generator Principle of Working
What is the Torque formula for a DC motor? Connect that with the parameters given to control the speed of rotation.
What can you say about Motor vs. Generator? Can you think of the Flemings Left Hand Rule and Right Hand Rule to apply it for Motor and Generator?
What is the emf generated formula for AC generator?
What shape is the curve of emf generated and why?
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