Ask Question, Ask an Expert


Ask Electrical & Electronics Expert

problem 1: describe the given methods of measuring efficient resistance of a coil by using resonance method:

a) Variation of capacitance.
b) Variation of frequency.

problem 2: describe the circuit and working of the Q-meter. describe its applications.

problem 3: describe the measurement of the given by using Q-meter:

a) Q-factor.
b) Inductance.
c) Effective resistance.
d) Self-capacitance.
e) Band width.
f) Capacitance.

problem 4: A capacitance of 250 pF produces resonance with a coil at a frequency of (2/π) ×106 Hz, whereas at the second harmonic of this frequency resonance is generated by a capacitance of 50 pF. Compute:

a) The self-capacitance
b) The inductance of the coil.

Neglect the effect of voltmeter capacitance and as well other stray capacitances.

problem 5: A coil of inductance L is tuned by a capacitance C to resonate at 1 MHz. A standard capacitor of 230 pF is tuned to resonate with similar coil at 2 MHz. If the resonance is indicated by a VTVM of capacitance 8 pF in parallel with the circuit, compute the values of L and C.

problem 6: A constant rms voltage of frequency 3 MHz is applied to a coil of inductance L and resistance R, a calibrated variable capacitor C and a thermo junction all in series. The un-calibrated ammeter is found to show similar scale reading I for the two values of C-namely 37 and 45 pF, one being below and the other above the capacitance C0 required to produce maximum current.

The capacitor is now adjusted to a value C0, and an added series resistance of 75Ω is found to decrease the current to prior value of I. Find out the values of L and R.

problem 7: Compute the Q-factor and effective resistance of a circuit tuned to a frequency of 1.5 MHz and containing an effective resistance of 150 pF. In this circuit the current drops to 70.7% of its resonant value when the frequency of an emf of constant magnitude injected in series with the circuit deviates from the resonant frequency by 5 KHz.

problem 8: The vacuum tube volt meter (VTVM) has been designed for the 1.0 dc output. The input impedance is specified as 1MΩ. Describe how you can incorporate 10 V and 100V multi-range facilities in the instrument.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M97594

Have any Question? 

Related Questions in Electrical & Electronics

1 describe the phasor technique of solving a differential

1. Describe the phasor technique of solving a differential equation for the sinusoidal steady-state solution. 2. State Coulomb's law. To what law in mechanics is Coulomb's law analogous? 3. What is the definition of the ...

For an ltid system specified by the equationa find the

For an LTID system specified by the equation a. Find the amplitude and the phase response. b. Find the system response y[n] for the input x[n] = cos (0.5k - (π/3)).

1 what is an anisotropic dielectric material2 when can an

1. What is an anisotropic dielectric material? 2. When can an effective permittivity be defined for an anisotropic dielectric material? 3. Briefly describe the phenomenon of magnetization. 4. What is a magnetic dipole? H ...

A a signal x t 5 sinc2 5pit cos 20pit is sampled at a

a. A signal x (t) = 5 sinc 2 (5πt) + cos 20πt is sampled at a rate of 10 Hz. Find the spectrum of the sampled signal. Can x (t) be reconstructed by lowpass filtering the sampled signal? b. Repeat part (a) for a sampling ...

Compute and plot the solution of the difference equation yn

Compute and plot the solution of the difference equation y[n] þ y[n 1] = 2x[n] þ x[n 1], where x[n] = 0.8n u[n] assuming zero initial conditions. Moreover, verify your answer (a) by examining if the derived solution sati ...

1 what are the different kinds of magnetic materials2 what

1. What are the different kinds of magnetic materials? 2. What is the magnetization vector? How is it related to the magnetic flux density? 3. Discuss how magnetization current arises in a magnetic material. 4. State the ...

1 discuss the solutions for the transmission-line equations

1. Discuss the solutions for the transmission-line equations in frequency domain. 2. Discuss the propagation constant and characteristic impedance associated with wave propagation on transmission lines. 3. What is the bo ...

1 in one-dimensional dct if n 1 the matrix transformation

1. In one-dimensional DCT, if N = 1, the matrix transformation is changed to simple multiplication. In other words, M = T × p, in which T, p, and M are numbers (scalar value) instead of matrices. What is the value of T i ...

A current distribution is given bywhere j0 is a constant

A current distribution is given by where J 0 is a constant. Using Ampere's circuital law in differential form and symmetry considerations, find the magnetic field everywhere.

A create a vector of 5000 random numbers distributed

a. Create a vector of 5000 random numbers distributed according to the normal distribution with mean m = and variance s 2 = 3. b. Plot the histogram. c. Compute the mean value and the variance of the samples. d. Create a ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro