Specify the points to which you could connect a voltmeter to measure the following potential differences in
[link] : (a) the potential difference of the voltage source; (b) the potential difference across
; (c) across
; (d) across
; (e) across
and
. Note that there may be more than one answer to each part.
To measure currents in
[link] , you would replace a wire between two points with an ammeter. Specify the points between which you would place an ammeter to measure the following: (a) the total current; (b) the current flowing through
; (c) through
; (d) through
. Note that there may be more than one answer to each part.
What is the sensitivity of the galvanometer (that is, what current gives a full-scale deflection) inside a voltmeter that has a
resistance on its 30.0-V scale?
What is the sensitivity of the galvanometer (that is, what current gives a full-scale deflection) inside a voltmeter that has a
resistance on its 100-V scale?
Find the resistance that must be placed in series with a
galvanometer having a
sensitivity (the same as the one discussed in the text) to allow it to be used as a voltmeter with a 0.100-V full-scale reading.
Find the resistance that must be placed in series with a
galvanometer having a
sensitivity (the same as the one discussed in the text) to allow it to be used as a voltmeter with a 3000-V full-scale reading. Include a circuit diagram with your solution.
Find the resistance that must be placed in parallel with a
galvanometer having a
sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 10.0-A full-scale reading. Include a circuit diagram with your solution.
Find the resistance that must be placed in parallel with a
galvanometer having a
sensitivity (the same as the one discussed in the text) to allow it to be used as an ammeter with a 300-mA full-scale reading.
Find the resistance that must be placed in series with a
galvanometer having a
sensitivity to allow it to be used as a voltmeter with: (a) a 300-V full-scale reading, and (b) a 0.300-V full-scale reading.
Find the resistance that must be placed in parallel with a
galvanometer having a
sensitivity to allow it to be used as an ammeter with: (a) a 20.0-A full-scale reading, and (b) a 100-mA full-scale reading.
Suppose you measure the terminal voltage of a 1.585-V alkaline cell having an internal resistance of
by placing a
voltmeter across its terminals. (See
[link] .) (a) What current flows? (b) Find the terminal voltage. (c) To see how close the measured terminal voltage is to the emf, calculate their ratio.
(a) 1.58 mA
(b) 1.5848 V (need four digits to see the difference)
(c) 0.99990 (need five digits to see the difference from unity)
Suppose you measure the terminal voltage of a 3.200-V lithium cell having an internal resistance of
by placing a
voltmeter across its terminals. (a) What current flows? (b) Find the terminal voltage. (c) To see how close the measured terminal voltage is to the emf, calculate their ratio.
A
voltmeter is placed in parallel with a
resistor in a circuit. (a) Draw a circuit diagram of the connection. (b) What is the resistance of the combination? (c) If the voltage across the combination is kept the same as it was across the
resistor alone, what is the percent increase in current? (d) If the current through the combination is kept the same as it was through the
resistor alone, what is the percentage decrease in voltage? (e) Are the changes found in parts (c) and (d) significant? Discuss.
A
ammeter is placed in series with a
resistor in a circuit. (a) Draw a circuit diagram of the connection. (b) Calculate the resistance of the combination. (c) If the voltage is kept the same across the combination as it was through the
resistor alone, what is the percent decrease in current? (d) If the current is kept the same through the combination as it was through the
resistor alone, what is the percent increase in voltage? (e) Are the changes found in parts (c) and (d) significant? Discuss.
Suppose you have a
galvanometer with a
sensitivity. (a) What resistance would you put in series with it to allow it to be used as a voltmeter that has a full-scale deflection for 0.500 mV? (b) What is unreasonable about this result? (c) Which assumptions are responsible?
(a) What resistance would you put in parallel with a
galvanometer having a
sensitivity to allow it to be used as an ammeter that has a full-scale deflection for
? (b) What is unreasonable about this result? (c) Which assumptions are responsible?
(a)
(b) You can’t have negative resistance.
(c) It is unreasonable that
is greater than
(see
[link] ). You cannot achieve a full-scale deflection using a current less than the sensitivity of the galvanometer.
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life