A mass of diatomic gas at a pressure of 2 atm is compressed adiabatically so that its temperature rise from 27oC to 927o C. The pressure of the gas is final state is
28 atm
68.7 atm
256 atm
256 atm
Two particle are oscillating along two close parallel straight lines sides by sides, with the same frequency and amplitudes. They pass each other, moving in opposite directions when their displacement is half of the amplitude. The mean position of the two particles lie on a straight line perpendicular to the paths of the two particles.
The phase difference is
zero
2π/3
π
π
A galvanometer of resistance, G is shunted by a resistance S ohm. To keep the main current in the circuit unchanged,the resistance to be put in series with the galvanometer is
A square loop, carrying a steady current I, is placed in a horizontal plane near a long straight conductor carrying a steady current I1 at a distance d from the conductor as shown in the figure. The loop will experience
a net repulsive force away from the conductor
a net torque acting upward perpendicular to the horizontal plane
a net torque acting downward normal to the horizontal plane
a net torque acting downward normal to the horizontal plane
A thermocouple force towards the conductor produces an emf of 40 μ V/oC in the linear range of temperature. A galvanometer of resistance 10 Ω whose sensitivity is 1μA/div, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be.
0.5oC
1oC
0.1oC
0.1oC
Charge q is uniformly spread on a thin ring of radius R. The ring rotates about its axis with a uniform frequency f Hz. The magnitude of magnetic induction at the centre of the ring is
μoqf / 2R
μoq / 2fR
μoq / 2πfR
μoq / 2πfR
The electric potential V at any point (x, y,z), all in meters in space is given by V= 4x2 volt. The electric field at the point (1,0,2) in volt/meter is
8 along positive X-axis
16 along negative x- axis
16 along positive X- axis
16 along positive X- axis
A short bar magnet of magnetic moment 0.4 JT-1 is placed in a uniform magnetic field of 0.16T. The magnet is stable equilibrium when the potential energy is
-0.64 J
zero
-0.082 J
-0.082 J
In the circuit shown in the figure, if potential at point A is taken to be zero,the potential at point B is
-1V
+2 V
-2 V
-2 V
D.
-2 V
By KVL along path ACDB
VA + 1 (1)(2) - 2 = VB
0+1 = VB
VB = 1V