There are two types of radioactivity – natural and artificial radioactivity. The phenomenon of radioactivity was first discovered by Henri […]
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Category: Physics
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Bohr’s theory of Atom
In 1913 Niels Henrik Bohr published his new theory of the atoms constitution. Just like Rutherford he assumed that electrons rotate around the nucleus. […]
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Thompson Rutherford Model
Modern atomic theory provides a reasonably satisfactory explanation of the properties of matter, the mechanisms of chemical change and the […]
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Capacitance in AC Circuits
When capacitors are connected across a direct current DC supply voltage they become charged to the value of the applied […]
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Alternating Current
A.C. circuits are circuits through which an alternating current flows. Such circuits are used extensively in power transmission, radio, telecommunication […]
Up to this point inductance and capacitance have been explained individually in ac circuits. The rest of this part will […]
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Capacitance Reactance
CAPACITIVE REACTANCE So far you have been dealing with the capacitor as a device which passes ac and in which […]
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Resonance in RLC Series Circuit
The current, I, in an RLC series circuit is given by I = V/Z = V/√R2 + (XL – XC)2 Where XL = […]
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Power in A.C Circuit
The average power dissipated in an A.C. circuit per cycle is given as: P=12I0V0 But, I0=2(Irms)−−−−−−√ and V0=2(Vrms)−−−−−−√∴P=12(2(Irms)−−−−−−√×2(Vrms)−−−−−−√)∴P=2IrmsVrms2∴P=IrmsVrms According to Ohm’s law, […]
When an a.c is applied through a capacitor, current leads by 90° or π2radians. They are out of phase. The ability […]