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General
Easy
Question
The magnetic field due to a current carrying square loop of side a at a point located symmetrically at a distance of a/2 from its centre (as shown is)
- zero
The correct answer is:
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Net magnetic field at the centre of the circle O due to a current carrying loop as shown in figure is (q < 180°)
Net magnetic field at the centre of the circle O due to a current carrying loop as shown in figure is (q < 180°)
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A current of i ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at 0 is
A current of i ampere is flowing through each of the bent wires as shown the magnitude and direction of magnetic field at 0 is
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A cylindrical tube of cross-sectional area A has two air tight frictionless pistons at its two ends. The pistons are tied with a straight two ends. The pistons are tied with a straight piece of metallic wire. The tube contains a gas at atmospheric pressure P0 and temperature T0 . If temperature of the gas is doubled then the tension in the wire is
A cylindrical tube of cross-sectional area A has two air tight frictionless pistons at its two ends. The pistons are tied with a straight two ends. The pistons are tied with a straight piece of metallic wire. The tube contains a gas at atmospheric pressure P0 and temperature T0 . If temperature of the gas is doubled then the tension in the wire is
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PV curve for the process whose VT curve is
PV curve for the process whose VT curve is
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An enclosed ideal gas is taken through a cycle as shown in the figure. Then
An enclosed ideal gas is taken through a cycle as shown in the figure. Then
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Two moles of monoatomic gas is expanded from (P0, V0 ) to (P0 , 2V0 ) under isobaric condition. Let 
, be the heat given to the gas, 
the work done by the gas and 
the change in internal energy. Now the monoatomic gas is replaced by a diatomic gas. Other conditions remaining the same. The corresponding values in this case are 
, 
, 
respectively, then
Two moles of monoatomic gas is expanded from (P0, V0 ) to (P0 , 2V0 ) under isobaric condition. Let , be the heat given to the gas, the work done by the gas and the change in internal energy. Now the monoatomic gas is replaced by a diatomic gas. Other conditions remaining the same. The corresponding values in this case are , , respectively, then
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Figure shows the pressure P versus volume V graphs for two different gas sample at a given temperature. MA and MB are masses of two samples, nA and nB are numbers of moles. Which of the following must be incorrect.
Figure shows the pressure P versus volume V graphs for two different gas sample at a given temperature. MA and MB are masses of two samples, nA and nB are numbers of moles. Which of the following must be incorrect.
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A process is shown in the diagram. Which of the following curves may represent the same process ?
A process is shown in the diagram. Which of the following curves may represent the same process ?
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A resistance coil connected to an external battery is placed inside an adiabatic cylinder fitted with a frictionless pistn and containing an ideal gas. A current i flows through the coil which has a resistance R. At what speed must the piston move upward in order that the temperature of the gas remains unchanged? Neglect atmospheric pressure.
A resistance coil connected to an external battery is placed inside an adiabatic cylinder fitted with a frictionless pistn and containing an ideal gas. A current i flows through the coil which has a resistance R. At what speed must the piston move upward in order that the temperature of the gas remains unchanged? Neglect atmospheric pressure.
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Considere the thermodynamics cycle shown on PV diagram. The process A 
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A cyclic process ABCA is shown in PT diagram. When presented on PV, it would
A cyclic process ABCA is shown in PT diagram. When presented on PV, it would
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An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?
An ideal gas undergoes a thermodynamics cycle as shown in figure. Which of the following graphs represents the same cycle?
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A closed container is fully insulated from outside. One half of it is filled with an ideal gas X separated by a plate P from the other half Y which contains a vacuum as shown in figure. When P is removed, X moves into Y. Which of the following statements is correct?
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Three processes compose a thermodynamics cycle shown in the PV diagram. Process 12 takes place at constant temperature. Process 23 takes place at constant volume, and process 31 is adiabatic. During the complete cycle, the total amount of work done is 10 J. During process 23, the internal energy decrease by 20J and during process 31, 20 J of work is done on the system. How much heat is added to the system during process 12?
Three processes compose a thermodynamics cycle shown in the PV diagram. Process 12 takes place at constant temperature. Process 23 takes place at constant volume, and process 31 is adiabatic. During the complete cycle, the total amount of work done is 10 J. During process 23, the internal energy decrease by 20J and during process 31, 20 J of work is done on the system. How much heat is added to the system during process 12?
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Two identical vessels A & B contain equal amount of ideal monoatomic gas. The piston of A is fixed but that of B is free. Same amount of heat is absorbed by A & B. If B's internal energy increases by 100 J the change in internal energy of A is
Two identical vessels A & B contain equal amount of ideal monoatomic gas. The piston of A is fixed but that of B is free. Same amount of heat is absorbed by A & B. If B's internal energy increases by 100 J the change in internal energy of A is
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