Physics-
General
Easy
Question
An ammeter of range 5 A is to be converted into an ammeter of range 10 V. If the resistance of ammeter be 0.1 , then what resistance should be converted in series with it?
- 1.1
- 1.9
- 2.1
- 4.9
The correct answer is: 1.9
R = (V/I) – GA = 10/5 – 0.1 = 1.9 W
Related Questions to study
Physics-
In the following figure, the value of resistor to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
In the following figure, the value of resistor to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
Physics-General
Physics-
Figure shows three resistor configurations R1,R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1 R2 and R3 is P1,P2 and P3, respectively, then (figure) :
Figure shows three resistor configurations R1,R2 and R3 connected to 3 V battery. If the power dissipated by the configuration R1 R2 and R3 is P1,P2 and P3, respectively, then (figure) :
Physics-General
Physics-
The three resistances of equal value are arranged in the different combinations shown in figure. Arrange them in increasing order of power dissipation :
I)
II)
III)
IV)
The three resistances of equal value are arranged in the different combinations shown in figure. Arrange them in increasing order of power dissipation :
I)
II)
III)
IV)
Physics-General
Physics-
If in the circuit, power dissipation is 150 W, then R is :
If in the circuit, power dissipation is 150 W, then R is :
Physics-General
Physics-
For maximum power dissipated in the external load of resistance R, R =
For maximum power dissipated in the external load of resistance R, R =
Physics-General
Physics-
Two cells of emf 4 V and 6 V are connected to an external load R = ¾ ohm. If = ¼ ohm the power dissipated in the load is
Two cells of emf 4 V and 6 V are connected to an external load R = ¾ ohm. If = ¼ ohm the power dissipated in the load is
Physics-General
General
The property of attracting or repelling objects on rubbing is called_____________.
The property of attracting or repelling objects on rubbing is called_____________.
GeneralGeneral
Physics-
In the given circuit, the voltmeter records 5 V. The resistance of the voltmeter (in ohms) is
In the given circuit, the voltmeter records 5 V. The resistance of the voltmeter (in ohms) is
Physics-General
Physics-
A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively. When same potential difference is applied between x and y, the voltmeter readings are VA, VB and VC. Then
A, B and C are voltmeters of resistance R, 1.5 R and 3R respectively. When same potential difference is applied between x and y, the voltmeter readings are VA, VB and VC. Then
Physics-General
Physics-
In the figure, if the ammeter reads 5 A and voltmeter reads 50 V, then the resistance R is
In the figure, if the ammeter reads 5 A and voltmeter reads 50 V, then the resistance R is
Physics-General
Physics-
In the circuit shown, the reading of the voltmeter V is
In the circuit shown, the reading of the voltmeter V is
Physics-General
Physics-
In the circuit shown here the readings of the ammeter and voltmeter are
In the circuit shown here the readings of the ammeter and voltmeter are
Physics-General
Physics-
If an ammeter is to be used in place of a voltmeter, then we must connect ammeter with a:
If an ammeter is to be used in place of a voltmeter, then we must connect ammeter with a:
Physics-General
Physics-
In the given circuit, the voltmeter records 5 V. The resistance of the voltmeter (in ohms) is :
In the given circuit, the voltmeter records 5 V. The resistance of the voltmeter (in ohms) is :
Physics-General
Chemistry-
The properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to-day life. One of its examples is the use of ethylene gal/Col and water mixture as anti-freezing liquid in the radiator of automobiles.
A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0:9:
Given: Freezing point depression constant of' water ( for water)
Freezing point depression constant of ethanol for ethanol)
Boiling point elevation constant of ethanol ( for ethanol)
Standard freezing point of water = 273 K
Standard freezing point of ethanol: 155.7 K
Standard boiling point of water = 373 K
Standard boiling point of ethanol 351.5 K
Vapour pressure of pure water 32.8- mm Hg
Vapour pressure of pure ethanol = 40 mm Hg
Molecular weight of water = 18 g
Molecular weight of ethanol = 46 g
In answering the following questions, consider the solutions to be ideal dilute solutions and solutes, to be non-volatile and non-dissociative.
Water is Added the solution M such that the mole fraction of water in the solution becomes 0.9 the boiling point of this solution is :
The properties such as boiling point, freezing point and vapour pressure of a pure solvent change when solute molecules are added to get homogeneous solution. These are called colligative properties. Applications of colligative properties are very useful in day-to-day life. One of its examples is the use of ethylene gal/Col and water mixture as anti-freezing liquid in the radiator of automobiles.
A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0:9:
Given: Freezing point depression constant of' water ( for water)
Freezing point depression constant of ethanol for ethanol)
Boiling point elevation constant of ethanol ( for ethanol)
Standard freezing point of water = 273 K
Standard freezing point of ethanol: 155.7 K
Standard boiling point of water = 373 K
Standard boiling point of ethanol 351.5 K
Vapour pressure of pure water 32.8- mm Hg
Vapour pressure of pure ethanol = 40 mm Hg
Molecular weight of water = 18 g
Molecular weight of ethanol = 46 g
In answering the following questions, consider the solutions to be ideal dilute solutions and solutes, to be non-volatile and non-dissociative.
Water is Added the solution M such that the mole fraction of water in the solution becomes 0.9 the boiling point of this solution is :
Chemistry-General