1
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Two masses '$$m_{\mathrm{a}}$$' and '$$\mathrm{m}_{\mathrm{b}}$$' moving with velocities '$$v_{\mathrm{a}}$$' and '$$v_{\mathrm{b}}$$' opposite directions collide elastically. Alter the collision '$$m_a$$' and '$$m_b$$' move with velocities and '$$v_{\mathrm{b}}$$' and '$$v_a$$' respectively, then the ratio $$\mathrm{m_a:m_b}$$ is

A
$$\frac{v_a+v_b}{v_a-v_b}$$
B
$$\frac{1}{2}$$
C
1
D
$$\frac{v_a-v_b}{v_a+v_b}$$
2
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A sample of radioactive element contains $$8 \times 10^{16}$$ active nuclei. The halt-life of the element is 15 days. The number of nuclei decayed after 60 days is

A
$$7.5 \times 10^{16}$$
B
$$2.0 \times 10^{16}$$
C
$$0.5 \times 10^{16}$$
D
$$4.0 \times 10^{16}$$
3
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment, with a source of light having wavelength $$6300 \mathop A\limits^o$$, the first maxima will occur when the

A
path difference is $$9200 \mathop A\limits^o$$
B
phase difference is $$\mathrm{n}$$ radian
C
phase difference is $$\frac{\pi}{2}$$ radian.
D
path difference is $$6300 \mathop A\limits^o$$
4
MHT CET 2021 20th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

What should be the radius of water drop so that excess pressure inside it is 72 Nm$$^{-2}$$ ? (The surface tension of water 7.2 $$\times$$ 10$$^{-2}$$ Nm$$^{-1}$$)

A
1 mm
B
2 mm
C
8 mm
D
4 mm
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12