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General
Easy
Question
Infinite number of straight wires each carrying current I are equally placed as shown in the figure. Adjacent wires have current in opposite direction. Net magnetic field at point P is
- Zero
The correct answer is:
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Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its centre at the origin of co-ordinate system. If current I is flowing thriugh each ring then the magnitude of the magnetic field at the common centre is
Three rings, each having equal radius R, are placed mutually perpendicular to each other and each having its centre at the origin of co-ordinate system. If current I is flowing thriugh each ring then the magnitude of the magnetic field at the common centre is
physics-General
physics-
A charge particle A of charge q = 2 C has velocity v = 100 m/s. When it passes through point A and has velocity in the direction shown. The strength of magnetic field at point B due to this moving charge is (r = 2 m).
A charge particle A of charge q = 2 C has velocity v = 100 m/s. When it passes through point A and has velocity in the direction shown. The strength of magnetic field at point B due to this moving charge is (r = 2 m).
physics-General
physics-
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)
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)
physics-General
physics-
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°)
physics-General
physics-
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
physics-General
physics-
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
physics-General
physics-
PV curve for the process whose VT curve is
PV curve for the process whose VT curve is
physics-General
physics-
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
physics-General
Physics-
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
Physics-General
physics-
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.
physics-General
physics-
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 ?
physics-General
physics-
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.
physics-General
physics-
Considere the thermodynamics cycle shown on PV diagram. The process A 
B is isobaric, B C is isochoric and C A is a straight line process. The following internal energy and heat are given : 
The heat flow in the process 
is :
Considere the thermodynamics cycle shown on PV diagram. The process A B is isobaric, B C is isochoric and C A is a straight line process. The following internal energy and heat are given : The heat flow in the process is :
physics-General
physics-
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
physics-General
physics-
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?
physics-General
