^Bending while turning If anything is pressed straight down, its reaction is straight up & has no horizontal component. But if pressing is done at some angle, then the reaction force has both horizontal & vertical components. This trick is the basis of bending while turning of a bike, aircraft, ice skater etc. The vertical […]
^Conical pendulum Horizontal component of the tension provides the necessary centripetal force & vertical component balances the weight of the particle. & T cos θ = mg Using simple rearrangements of above relations we can write following results
^Cars on curved bridges Three identical cars A, B and C are moving at the same uniform, speed on three bridges. The car A goes on a plane bridge, B on a bridge convex upward and C goes on a bridge concave upward . Let NA, NB and NC be the normal forces exerted by […]
^Centrifugal force A pseudo force experienced due to change in direction is called centrifugal force. Centripetal force is a real force while centrifugal force is pseudo. Mathematically both are equal in magnitude.
^Centrifugal force A pseudo force experienced due to change in direction is called centrifugal force. Centripetal force is a real force while centrifugal force is pseudo. Mathematically both are equal in magnitude.
^Forces in circular motion When seen from inertial frame two types of forces act is a circular motion, one that changes speed & the other that changes direction. A force that acts tangential of velocity changes the speed only, called tangential force. Its magnitude is given by A force acting normal to velocity towards turning […]
^Logic Gates Basic building blocks of digital electronics made of semiconducting material & used to control the flow of information from input to output in a logical manner & are used in calculators, digital watches, computers, robots, industrial control systems, and in telecommunications.
^SCs Versus VT devices Semiconducting devices are the basic building blocks of all the modern electronic circuits & have following advantages over conventional vacuum tubes: don’ require a heating battery & thus set in to operation as soon as the circuit is switched on. require comparatively low voltage for their operation. don’t produce any humming […]
^Oscillator An oscillator is self sustained transistor amplifier with a positive feedback which produce electric oscillation of constant frequency & amplitude without requiring any external input signal. It converts dc energy obtained from a battery into ac energy in same oscillatory circuit.
^CEA Output is 1800 out of phase with input. Transconductance is also called mutual conductance. As β > > α, thus the ac power gain of a CEA is much larger than that of a CBA. Remember the transistor is not generating any power. The energy for the higher ac power at the output is […]
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