1
WB JEE 2023
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WB JEE 2023 Physics - Heat and Thermodynamics Question 6 English

A cyclic process is shown in p-v diagram and T-S diagram. Which of the following statements is/are true?

A
1$$\to$$2 : Isobaric, 2$$\to$$3 : Isothermal.
B
3$$\to$$1 : Isochoric, 2$$\to$$3 : adiabatic.
C
Work done by the system in the complete cyclic process is non-zero.
D
The heat absorbed by the system in the complete cyclic process is non-zero.
2
WB JEE 2023
MCQ (More than One Correct Answer)
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WB JEE 2023 Physics - Current Electricity Question 4 English

The figure shows two identical parallel plate capacitors A and B of capacitances C connected to a battery. The key K is initially closed. The switch is now opened and the free spaces between the plates of the capacitors are filled with a dielectric constant 3. Then which of the following statements is/are true?

A
When the switch is closed, total energy stored in the two capacitors is CV$$^2$$.
B
When the switch is opened, no charge is stored in the capacitor B.
C
When the switch is opened, energy stored in capacitor B is $$\frac{3}{2}$$CV$$^2$$.
D
When the switch is opened, total energy stored in two capacitors is $$\frac{5}{3}$$CV$$^2$$.
3
WB JEE 2023
MCQ (More than One Correct Answer)
+2
-0
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A charged particle of charge q and mass m is placed at a distance 2R from the centre of a vertical cylindrical region of radius R where magnetic field varies as $$\vec{B}=\left(4 t^{2}-2 t+6\right) \hat{k}$$, where t is time. Then which of the following statements is/are true?

A
Induced electric field lines form closed loops.
B
Electric field varies linearly with r if r < R, where r is the radial distance from the centerline of the cylinder.
C
The charged particle will move in clockwise direction when viewed from top.
D
Acceleration of the charged particle is $$\mathrm{\frac{7q}{2m}}$$ when t = 2 sec.
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