2020 MHT-CET PCM SET - 01 — MHT - CET STD 12 Science — Question

The susceptibility of a magnetic material is positive and small. The material is ______.

A conductor in the fom1 of a right angle `\triangle` ABC with AB = 3 cm and BC = 4 cm carries a current of 15 A. There is a uniform magnetic field of 8 T perpendicular to the plane of the conductor. The force on the conductor will be ______.

Calculate the number of sperms and ova produced from 40 primary spermatocytes and 40 primary oocytes.

If y = `2/(sqrt(a^2 - b^2))tan^-1[sqrt((a - b)/(a + b)) tan x/2], "then" (d^2y)/dx^2|_{x = pi/2}` = ______

In a study of transistor as an amplifier, the ratio of collector current to emitter current is 0.98. The collector current is 3mA, then base current will be approximately ______.

What is the method of male known as?

The ratio of frequencies of oscillations of two simple pendulums is 3: 4 then their lengths are in the ratio ______.

The real force 'F' acting on a particle of mass ' m' performing circular motion acts along the radius of circle 'r' and is directed towards the centre of circle. The square root of the magnitude of such force is (T = periodic time).

Which of the following polymers is prepared by using phenol?