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Electric Circuits
propose a circuit to obtain +10 V dc regulated output using IC7812
Electric Circuits
An electrical source with internal resistance r is used to operate a lamp of resistance R. What fraction of the total power is delivered to
the lamp?
the lamp?
Electric Circuits
Design and draw a zener voltage regulator to provide 10v Output if load resistance varies between 50 ohm and 200 ohm. Assume that the input unregulated dc voltage is 15v and minimum zener operating current is 10 mA. Calculate the wattage of the zener diode. Value and wattage of Rs.
Electric Circuits
Explain the ALT and CHOP modes of dual trace oscilloscope.
Electric Circuits
Propose a circuit to obtain +10V dc regulated output using IC 7812
Electric Circuits
Determine the resonant frequency for the circuit :
1)10 ohm
2)AC input
3)1 mH
4)100 nF
Calculate the impedance of the circuit 5 kHz above and 5 kHz below the resonance frequency.
1)10 ohm
2)AC input
3)1 mH
4)100 nF
Calculate the impedance of the circuit 5 kHz above and 5 kHz below the resonance frequency.
Electric Circuits
2)prove that the reciprocity theorem is valid for the circuit.
1)20 ohm
2)10 v
3)30 ohm (middle)
4)20 ohm
5)10 ohm
1)20 ohm
2)10 v
3)30 ohm (middle)
4)20 ohm
5)10 ohm
Electric Circuits
A time varying magnetic field B(t) = B0 coswt
r r
pointing out of the page fills the region
enclosed by a circle of radius a shown in the figure below. Determine the induced electric
field.
r r
pointing out of the page fills the region
enclosed by a circle of radius a shown in the figure below. Determine the induced electric
field.
Electric Circuits
In a cyclotron, the diameter of the pole faces is 100 cm and the magnetic field between
the pole faces is 0.60 T. The cyclotron is used for accelerating protons. Calculate the
kinetic energy of proton in eV and speed of the proton as it emerges from the cyclotron.
Also determine the cyclotron frequency.
the pole faces is 0.60 T. The cyclotron is used for accelerating protons. Calculate the
kinetic energy of proton in eV and speed of the proton as it emerges from the cyclotron.
Also determine the cyclotron frequency.
Electric Circuits
In the Bohr model of hydrogen atom, the electron follows a circular orbit centred on the
nucleus containing a proton. The motion of the electron along the circular orbit
constitutes a current. Calculate the magnetic field produced by the orbiting electron at the
site of the proton.
nucleus containing a proton. The motion of the electron along the circular orbit
constitutes a current. Calculate the magnetic field produced by the orbiting electron at the
site of the proton.
