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The diagram at right shows two charged objects that
are separated by a distance L. Object #1 bears a
charge +7Q and object #2 a charge of ‒4Q. A point in
space, P, is located a distance y directly above object
#2.
The collector current of a transistor used as an amplifier changes from 6MA to 18MA as the base current change from 5µA to 25µA. What is the current amplification factor of a transistor?
A transformer has 500 primary turns and 200 secondary turns. The primary and secondary resistances
are 0.3Ω and 0.02Ω respectively and the corresponding leakage reactance are 2Ω and 0.05Ω
respectively. Determine:
(a) the equivalent resistance and reactance referred to the primary side
(b) the equivalent resistance and reactance referred to the primary side, impedance summed
(c) the output power factor
(d) draw the equivalent circuit referred to the primary side, impedance summed
(e) input and output apparent power
. An ideal parallel plate capacitor of capacitance C has circular plates located at z = 0 and z = d respectively. The medium between the plates is a linear, homogeneous, isotropic dielectric of dielectric constant K. The capacitor is connected to a resistance R in series, and a voltage V is applied to the circuit. The charge q on the capacitor plates increases with time according to q = C V (1-e−t/RC). Find the magnitude of the
magnetic field H inside the dielectric.
ω, α and a are positive constants. Find the induced electric field at all points in space.
Q4. An ideal parallel plate capacitor of capacitance C has circular plates located at z = 0 and z = d respectively. The medium between the plates is a linear, homogeneous, isotropic dielectric of dielectric constant K. The capacitor is connected to a resistance R in series, and a voltage V is applied to the circuit. The charge q on the capacitor plates increases with time according to q = C V (1-e−t/RC). Find the magnitude of the (5)
magnetic field H inside the dielectric. (5)
what is the magnetic force on ions during a nerve pulse
a coil of and radius 2 cm carrying a current at a rate of 1.9A/s is placed coaxially inside a solenoid of 500 turns and having radius 5 cm. find the induced emf produced in the solenoida coil of and radius 2 cm carrying a current at a rate of 1.9A/s is placed coaxially inside a solenoid of 500 turns and having radius 5 cm. find the induced emf produced in the solenoid
Why dielectric constant effect electrostatic force, what is its significance?
a square with sides 10cm has three charges on it edges, two are+5mC and one is -3mC. draw a well labelled diagram to illustrate the question and compute the total field at the vacant edge due to the other charges
A charge _q is distributed uniformly over a sphere with a positive charge q at its centre.Also the same situation for an ellipsoid ..with respect to the origin of the coordinate system find the correct statement
(a)dipole moment is zero for both cases (b)dipole moment non zero for 1st case but zero in next case (c)dipole moment zero for 1st case but non zero in next case (d ) non zero both cases
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