Chapter 20 – Heating Effects of Current and Instruments
Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 20 - Heating Effects of Current and Instruments
When an ammeter of negligible internal resistance is inserted in series with circuit, it reads 1 A. When a voltmeter of very large resistance is connected across R1, it reads 3 V. But when the points A and B are short circuited by a conducting wire, then the voltmeter measures 10.5 V across the battery. The internal resistance of the battery is equal to
06
Dec
When an ammeter of negligible internal resistance is inserted in series with circuit, it reads 1 A. When a voltmeter of very large resistance is connected across R1, it reads 3 V. But when the points A and B are short circuited by a conducting wire, then the voltmeter measures 10.5 V across the battery. [...]
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it reads 1 A. When a voltmeter of very large resistance is connected across R1 ,
it reads 3 V. But when the points A and B are short circuited by a conducting wire ,
then the voltmeter measures 10.5 V across the battery. The internal resistance of the battery is equal to ,
When an ammeter of negligible internal resistance is inserted in series with circuit ,
The emf of the driver cell of a potentiometer is 2V, and its internal resistance is negligible. The length of the potentiometer wire is 100cm, and resistance is 5 ohm. How much resistance is to be connected in series with the potentiometer wire to have a potential gradient of 0.05mVcm^−1?
06
Dec
The emf of the driver cell of a potentiometer is 2V, and its internal resistance is negligible. The length of the potentiometer wire is 100cm, and resistance is 5 ohm. How much resistance is to be connected in series with the potentiometer wire to have a potential gradient of 0.05mVcm^−1? and its internal resistance is [...]
In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of `2 m` when the cell is shunted by a `5 Omega` resistance, and is at a length of `3 m` when the cell is shunted by a `10 Omega` resistance. The internal resistance of the cell is, then
06
Dec
In an experiment to measure the internal resistance of a cell by potentiometer, it is found that the balance point is at a length of `2 m` when the cell is shunted by a `5 Omega` resistance, and is at a length of `3 m` when the cell is shunted by a `10 Omega` resistance. [...]
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Chapter 20 - Heating Effects of Current and Instruments
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and is at a length of `3 m` when the cell is shunted by a `10 Omega` resistance. The internal resistance of the cell is ,
In an experiment to measure the internal resistance of a cell by potentiometer ,
it is found that the balance point is at a length of `2 m` when the cell is shunted by a `5 Omega` resistance ,
then ,
Figure shows a balanced Wheatstone net. Now, it is disturbed by changing P to 11 ohm. Which of the following steps will not bring the bridge to balance again?
06
Dec
Figure shows a balanced Wheatstone net. Now, it is disturbed by changing P to 11 ohm. Which of the following steps will not bring the bridge to balance again? Figure shows a balanced Wheatstone net. Now it is disturbed by changing P to 11 ohm. Which of the following steps will not bring the bridge [...]
Figure shows a simple potentiometer circuit for measuring a small emf produced by a thermocouple. The meter wire PQ has a resistance of 5 ohm, and the driver cell has an emf of 2.00 V. If a balance point is obtained 0.600 m along PQ when measuring an emf of 6.00 mV what is the value of resistance R?
06
Dec
Figure shows a simple potentiometer circuit for measuring a small emf produced by a thermocouple. The meter wire PQ has a resistance of 5 ohm, and the driver cell has an emf of 2.00 V. If a balance point is obtained 0.600 m along PQ when measuring an emf of 6.00 mV what is the [...]
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Cengage JEE Mains Physics by B.M Sharma
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Chapter 20 - Heating Effects of Current and Instruments
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and the driver cell has an emf of 2.00 V. If a balance point is obtained 0.600 m along PQ when measuring an emf of 6.00 mV what is the value of resistance R? ,
Figure shows a simple potentiometer circuit for measuring a small emf produced by a thermocouple. The meter wire PQ has a resistance of 5 ohm ,
In which one of the following arrangements of resistors does the meter M, which has a resistance of 2Ω, give the largest reading when the same potential difference is applied between points P and Q
06
Dec
In which one of the following arrangements of resistors does the meter M, which has a resistance of 2Ω, give the largest reading when the same potential difference is applied between points P and Q give the largest reading when the same potential difference is applied between points P and Q? In which one of [...]
In the circuit shown in figure, an ideal ammeter and an ideal voltmeter are used. When the key is open, the voltmeter reads 1.53 V. When the key is closed, the ammeter reads 1.0 A and the voltmeter reads 1.03 V. The resistance R is
06
Dec
In the circuit shown in figure, an ideal ammeter and an ideal voltmeter are used. When the key is open, the voltmeter reads 1.53 V. When the key is closed, the ammeter reads 1.0 A and the voltmeter reads 1.03 V. The resistance R is an ideal ammeter and an ideal voltmeter are used. When [...]
Figure shows a circuit that may be used to compare the resistance R of an unknown resistor with a 100 ohm standard. The distances l from one end of the potentiometer slider wire to the balance point are 400 mm and 588 mm when X is connected to Y and Z, respectively. The length of the slide wire is 1.00 m. What is the value of resistance R?
06
Dec
Figure shows a circuit that may be used to compare the resistance R of an unknown resistor with a 100 ohm standard. The distances l from one end of the potentiometer slider wire to the balance point are 400 mm and 588 mm when X is connected to Y and Z, respectively. The length of [...]
A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as an ammeter of range 1A, the required shunt must have a resistance of
06
Dec
A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as an ammeter of range 1A, the required shunt must have a resistance of A milliammeter of range 10 mA has a coil of resistance 1 Ω. To use it as an ammeter of range 1A the required shunt [...]
The resistance of a galvanometer is 10Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be
06
Dec
The resistance of a galvanometer is 10Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series for converting it into a voltmeter of 2.5 V will be The resistance of a galvanometer is 10Ω. It gives full-scale deflection when 1 mA current is passed. The resistance connected in series [...]