MHT CET Chemistry Model Test 05 — MHT - CET STD 12 Science — Question

A galvanometer of resistance 100 Ω requires 10 µA current for full scale deflection. Now a resistance of 1 Ω is connected to convert it into an ammeter. The minimum current required to obtain full scale deflection is ______.

Based on first law of thermodynamics which of the following is correct.

How is contraception achieved with intra uterine devices such as copper T and loop?

A charged particle is moving in a uniform magnetic field in a circular path of radius R. When the energy of the particle becomes three times the original, the new radius will be ______.

The ratio of kinetic energy to the potential energy of a particle executing S.H.M. at a distance equal to (1/3)rd of its amplitude is ______.

A tuning fork with frequency 800 Hz produces resonance in a resonance column tube with upper end open and lower end closed by water surface. Successive resonances are observed at lengths 9.75 cm, 31.25 cm and 52.75 cm. The speed of sound in air is, ____________.

The enzymes get denatured ______.

Which of the following is true in a triangle ABC?

A normal man marries a female carrier for sickle cell anemia. What are the chances of having carrier children?

Into which of the following the functional megaspore in an angiosperm develops?