# Physics

## 1. Write your understanding on resonance condition for an RLC circuit. What are the reactance’s for a capacitor and an inductor in RLC circuit? 2. Determine the resonance frequency and bandwidth from the graph. Find the Q-factor also. A resonance curve for the parallel LC circuit 1 0.9 0.8 0.7 0.6 Voltage 0.5 0.4 0.3 0.2 0.1 8 0 0 4 7 10 Frequency: Bandwidth: Q-Factor: Frequency KHz KHz

EXPERT ANSWER The resonance is the condition where we get maximum value of the amplitude and in RLC circuit when the impedance is minimum at a particular frequency then we get maximum amplitude and that frequency is known as resonant frequency. Bandwidth is the difference of half part frequencies and can be obtained from the …

## 6. A body is dropped from a height of 300ft with an initial velocity of 30 ft /sec. Assuming no air resistance, (a) find an expression for the velocity of the body at any time t; (b) find the time r(1u1red for the body to hit the ground. 7. A ball is propelled straight up with an initial velocity of 250 ft/sec in a vacuum with no air resistance. How high will it go ?

EXPERT ANSWER 6) a) V = U + g*t where U – initial velocity b) h = ut + .5gt^2 300 = 30t + .5* 32.17*t^2 t = 3.49 sec 7) h = u^2 /2g = 250^2/(2*32.17) = 971.4 ft

## Use a phasor diagram to show that the resultant amplitude of two waves πΈ1 = πΈππ πππ½ πΈ2 = πΈππ ππ(π½ + π)

Use a phasor diagram to show that the resultant amplitude of two waves πΈ1 = πΈππ πππ½ πΈ2 = πΈππ ππ(π½ + π) EXPERT ANSWER