11.

An ideal gas goes from state A to state B via three different processes as indicated in the p-V diagram.



If Q₁, Q₂, Q₃ indicate the heat absorbed by the gas along the three processes and ΔU₁, ΔU₂, ΔU₃ indicate the change in internal energy along the three processes respectively, then

• Q₁> Q₂> Q₃ and ΔU₁=ΔU₂= ΔU₃ 

• Q₃> Q₂> Q₁ and ΔU₁=ΔU₂= ΔU₃ 

• Q₁= Q₂= Q₃ and ΔU₁=ΔU₂= ΔU₃ 

• Q₁= Q₂= Q₃ and ΔU₁=ΔU₂= ΔU₃ 

The equation of a simple harmonic wave is given by

where x nd y are in metres and t is in seconds. The ratio of maximum particle celocity of the wave velocity is

• 2π

• 3π/2

• 3π

• 3π

A train moving t a speed of 220 ms^-1 towards a stationary object. emits a sound of frequency 1000 Hz. Some of the sound reaching the object gets reflected back to the train as echo. The frequency of the echo as detected by the driver of the train is
(speed of sound in air is 330 ms^-1)

• 3500 Hz

• 4000 Hz

• 5000 Hz

• 5000 Hz

A parallel plate capacitor has a uniform electrinc field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy storedf in the capacitor is df and area of each plate  is A, the energy stored in the capacitor is 

Two metallic spheres of radii 1 cm and 3 cm are given charges of (-1 x 10^-2 C) and 5 x 10^-2 C , respectively. If these are connected by a conducting wire, the final charge on the bigger sphere is

• 2 x 10^-2 C

• 3 x 10^-2 C

• 4 x 10^-2 C

• 4 x 10^-2 C

The power dissipated in the circuit shiwn in the figure is 30 Watt. The value of R is

• 20 Ω

• 15Ω

• 10Ω

• 10Ω

A cell having an emf and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by

A magnetic needle suspended parallel to a magnetic field requires  J of work to turn it through  60^o. The torque needed to maintain the needle in this position will be

• 

• 3 J

• 
• 

The instantaneous values of alternating current and voltages in a circuit are given as


The average power in Watts consumed in the circuit is

• 1/4

• 

• 1/2

• 1/2

In a coil of resistance 10Ω, the induced current developed by changing magnetic flux through it is shown in the figure as a function of time. The magnitude of change in flux through the coil in weber is 

• 8

• 2

• 6

• 6