JEE, NEET, Foundation & CBSE (JEE Advanced 2018

The moment of inertia of a uniform cylinder of length l and radius R about its perpendicular bisector is I. What is the ratio l/R such that the moment of inertia is minimum ?
A body is thrown vertically upwards. Which one of the following graphs correctly represent the velocity vs time?
Cp and Cv are specific heats at constant pressure and constant volume respectively. It is observed that Cp – Cv = a for hydrogen gas Cp – Cv = b for nitrogen gas The correct relation between a and b is-
  1. a=b
  2. a=14 b
  3. a=28 b
  4. a=(1/4)b
A capacitance of 2 𝛍F is required in an electrical circuit across a potential difference of 1.0 kV. A large number of 1 𝛍F capacitors are available which can with stand a potential difference of not more than 300 V. number of capacitors requir
  1. 2
  2. 16
  3. 24
  4. 32
In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be :
  1. 45⁰
  2. 90⁰
  3. 135⁰
  4. 180⁰
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