Cengage JEE Mains Physics by B.M Sharma
In figure, when an ideal voltmeter is connected across 4000 ohm resistance, it reads 30 V. If the voltmeter is connected across 3000 ohm resistance, it will read.
06
Dec
In figure, when an ideal voltmeter is connected across 4000 ohm resistance, it reads 30 V. If the voltmeter is connected across 3000 ohm resistance, it will read. In figure it reads 30 V. If the voltmeter is connected across 3000 ohm resistance it will read when an ideal voltmeter is connected across 4000 ohm [...]
If a shunt 1/10 of the coil resistance is applied to a moving coil galvanometer, its sensitivity becomes.
06
Dec
If a shunt 1/10 of the coil resistance is applied to a moving coil galvanometer, its sensitivity becomes. If a shunt 1/10 of the coil resistance is applied to a moving coil galvanometer its sensitivity becomes December 6, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , Chapter 20 - Heating Effects of Current [...]
A candidate connect a moving coil voltmeter V, a moving coil ammeter A, and a resistor R as shown in figure. If the voltmeter reads 20 V and the ammeter reads 4A, R is
06
Dec
A candidate connect a moving coil voltmeter V, a moving coil ammeter A, and a resistor R as shown in figure. If the voltmeter reads 20 V and the ammeter reads 4A, R is A candidate connect a moving coil voltmeter V a moving coil ammeter A and a resistor R as shown in figure. [...]
A milliammeter of range 10mA and resistance 9 Ω is joined in a circuit as shown. The meter gives full-scale deflection for current I when A and B are used as its terminals, i.e. current enters at A and leaves at B (C is left isolated). The value of I is
06
Dec
A milliammeter of range 10mA and resistance 9 Ω is joined in a circuit as shown. The meter gives full-scale deflection for current I when A and B are used as its terminals, i.e. current enters at A and leaves at B (C is left isolated). The value of I is A milliammeter of range [...]
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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Cengage JEE Mains Physics by B.M Sharma
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Chapter 20 - Heating Effects of Current and Instruments
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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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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 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 [...]
Posted in:
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 [...]