A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it to extend its range its range to nV volt.
Sahay Sir > Question Answers > A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it to extend its range its range to nV volt.
The emf E and the internal resistance r of the battery shown in figure are 6 V and 2.5 Ω respectively. The external resistance R is 25Ω. The resistances of the ammeter and voltmeter are 5.0Ω and 225Ω respectively. (a) Find the readings of the two meters. (b) The switch is thrown to the other side. What will be the readings of the two meters now?
03
Sep
The emf E and the internal resistance r of the battery shown in figure are 6 V and 2.5 Ω respectively. The external resistance R is 25Ω. The resistances of the ammeter and voltmeter are 5.0Ω and 225Ω respectively. (a) Find the readings of the two meters. (b) The switch is thrown to the other [...]
A voltmeter of resistance RV and an ammeter of resistance RA are connected as shown in an attempt to measure the resistance R. The measured value of the resistance is RM=VI0 where V is reading of voltmeter and I0 is reading of the ammeter. find the true value of the resistance in terms of RM, RV and RA.
03
Sep
A voltmeter of resistance RV and an ammeter of resistance RA are connected as shown in an attempt to measure the resistance R. The measured value of the resistance is RM=VI0 where V is reading of voltmeter and I0 is reading of the ammeter. find the true value of the resistance in terms of RM, [...]
You are given two resistors X and Y whose resistances are to be determined using an ammeter of resistance 0.5Ω and a voltmeter of reistance 20kΩ. It is known that x is in the range of a few ohms. While Y is in the range of several thousand ohms. In each case, while of the following two connections (fig.) would you choose for resistance measurement? Justify your answer
03
Sep
You are given two resistors X and Y whose resistances are to be determined using an ammeter of resistance 0.5Ω and a voltmeter of reistance 20kΩ. It is known that x is in the range of a few ohms. While Y is in the range of several thousand ohms. In each case, while of the [...]
A galvanometer reads 5⋅0V at full scale deflection and is graded according to its resistance per volt at full scale deflection as 5000ΩV−1. (i) How will you convert it into a voltmeter that reads 20V at full scale deflection? (ii) Will it still be graded 5000ΩV−1? (iii) Will you prefer this voltmeter to one that is graded 2000ΩV−1?
03
Sep
A galvanometer reads 5⋅0V at full scale deflection and is graded according to its resistance per volt at full scale deflection as 5000ΩV−1. (i) How will you convert it into a voltmeter that reads 20V at full scale deflection? (ii) Will it still be graded 5000ΩV−1? (iii) Will you prefer this voltmeter to one that [...]
In figure, (i) find the potential difference between the points A and B. (ii) Now we wish to measure this potential difference by using a voltmeter of resistance 2 kohm. Find the reading of the voltmeter and percentage error. (iii) solve part (ii) if the voltmeter were of resistance 20 kohm. What conclusion do you draw from the results you get in the above parts?
03
Sep
In figure, (i) find the potential difference between the points A and B. (ii) Now we wish to measure this potential difference by using a voltmeter of resistance 2 kohm. Find the reading of the voltmeter and percentage error. (iii) solve part (ii) if the voltmeter were of resistance 20 kohm. What conclusion do you [...]
The scale of galvanometer is divided into 150 equal divisions. The galvanometer has a current sensitivity of 10 divisions/mA and the voltage sentivity of 2 divisions/mV. How the galvanometer be designed to read (i) 6A per division and (ii) 1 V per division?
03
Sep
The scale of galvanometer is divided into 150 equal divisions. The galvanometer has a current sensitivity of 10 divisions/mA and the voltage sentivity of 2 divisions/mV. How the galvanometer be designed to read (i) 6A per division and (ii) 1 V per division? A galvanometer has a resistance of G ohm and range of V [...]
A galvanometer has a resistance of 30 ohm and a current of 2 mA is needed to give a full scale deflection. What is the resistance needed and how is it to be connected to convert this galvanometer (a) Into an ammeter of 0.3 A range ? (b) Into a volmeter of 0.2 V range ?
03
Sep
A galvanometer has a resistance of 30 ohm and a current of 2 mA is needed to give a full scale deflection. What is the resistance needed and how is it to be connected to convert this galvanometer (a) Into an ammeter of 0.3 A range ? (b) Into a volmeter of 0.2 V range [...]
A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it to extend its range its range to nV volt.
03
Sep
A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it to extend its range its range to nV volt. A galvanometer has a resistance of G ohm and range of V volt. Calculate the resistance to be used in series with it [...]