Day 233: JEE Mains Physics

Ray Optics. Asked once: 2021 Paper 18 (same type asked 2 times) See all 2 of this type

Semiconductor Electronics. Asked once: 27 Jan 2024 (same type asked 2 times) See all 2 of this type

Work, Energy and Power. Asked once: 29 Jan 2024 (same type asked 2 times) See all 2 of this type

102

A bob of mass ' $m$ ' is suspended by a light string of length ' $L$ '. It is imparted a minimum horizontal velocity at the lowest point A such that it just completes half circle reaching the top most position B. The ratio of kinetic energies $\frac{(\text{~K.E.~})_{A}}{(\text{~K.E.~})_{B}}$ is:

1. A.
   $3:2$
2. B.
   $5:1$
3. C.
   $2:5$
4. D.
   $1:5$

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Alternating Current. Asked once: 6 Apr 2024 (same type asked 2 times) See all 2 of this type

Electrostatics. Asked once: 27 Jun 2022 (same type asked 2 times) See all 2 of this type

115

A paralle plate capacitor is made up of stair like structure with a palte area $A$ of each stair and that is connected with a wire of length $b$, as shown in the figure. The capacitance of the arrangement is $\frac{x}{15}\frac{\varepsilon_{0}\text{ }A}{\text{ }b}$. The value of $x$ is

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