A person working on a steel structure while standing on ground. An accident occurred where 7 A pass through the structure to the ground. The structure is grounded by a hemisphere with radius of 0.2 m. Assume the man's body resistance is 2000 ohm and soil resistivity is 100 ohm.m. Calculate the current (in Ampere) through man Answer:

A person working on a steel structure while standing on ground. An accident occurred where 7 A pass through the structure to the ground. The structure is grounded by a hemisphere with radius of 0.2 m. Assume the man's body resistance is 2000 ohm and soil resistivity is 100 ohm.m. Calculate the current (in Ampere) through man Answer:

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.7MCQ: Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a)...

See similar textbooks

Similar questions

Using the rules for parallel circuits and Ohmslaw, solve for the missing values. ETE1E2E3E4ITl1I2l33.2AI4RT3.582R116R210R3R420PTP1P2P3P4
1. What is the relationship of voltage and current (concerning phase angle) in a pure resistive circuit?
There is a steel guide bar (According to figure), knowing that its conductivity is 7x106 (ohm - m)-1 . Determine the resistance at 45 ° C and the gauge of a copper wire for its connection.
An inductance of L Henries and a resistance of 15 ohms are connected in series with EMF of 135 volts. If the current is initially zero, and is equal to 7 amperes after 3 seconds. Determine L and the current after 5 s.
Why it is fun to compute problems about ohms law
3. The figure on the left below shows a schematic diagram of a battery. The voltage measured by U1 is called the terminal voltage given R1 = 1 ohm. In the figure on the right below, the terminal voltage of each of the battery-resistor combination is Vr = 1.5 volts. Find the following: a. The current passing through R5. b. The currents passing through R1 and R3 C. The voltage across R1. d. The voltage of the battery EMF. e. The percentage of voltage loss ot the battery due to the internal resistance R1. The power dissipated by the internal resistance R1. g. The power dissipated by R5 if R1 = R2 = R3 = R4 = 0. h. The percentage of power dissipation loss due to the four resistors R1, R2, R3, and R4 f. R1 R3 S10 R1 U1 1.500 EMF EMF R5 100 V1 R2 $10 EMF R4 EMF EMF
7. An inductance of 2 henry and a resistance of 10 ohms are connected in series with and electromotive force of 100 volts. Determine a) the current i as a function of the time t b) what is the current at the end of 0.1 second?
b) A certain winding made up of copper has a resistance of 100 Q at room temperature. If resistance temperature coefficient of copper at 0 C° is 0.00428/C°, calculate the winding resistance if temperature is increased to 45 C°. Assume room temperature as 25 C°.
8. The resistance of a copper at 30°C is 50 ohms. If the temperature coefficient of copper at 0°C is 0.00427. What is the resistance at 100°C? 9. A wire has a resistance R are cut into 2 pieces and the small pieces are connect in parallel resulting to a total resistance of 2 ohms. What is the value of R?
Ferromagnetic materials have this characteristic. A. A relative permeability slightly less than one. B. A relative permeability slightly greater than one. C. A very high resistivity. D. A high relative permeability.
Example 1.5: A certain winding made up of copper has a resistance of 100 2 at room temperature. If resistance temperature coefficient of copper at 0 C° is 0.00428/C°, calculate the winding resistance if temperature is increased to 50 C°. Assume room temperature as 25 C°.
How temperature effect conductivity? Explain with the help of following equation. m e'n7'