1
JEE Main 2023 (Online) 11th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A body of mass $$500 \mathrm{~g}$$ moves along $$\mathrm{x}$$-axis such that it's velocity varies with displacement $$\mathrm{x}$$ according to the relation $$v=10 \sqrt{x} \mathrm{~m} / \mathrm{s}$$ the force acting on the body is:-

A
166 N
B
5 N
C
25 N
D
125 N
2
JEE Main 2023 (Online) 11th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

In satellite communication, the uplink frequency band used is :

A
$$3.7-4.2 \mathrm{~GHz}$$
B
$$5.925-6.425 \mathrm{~GHz}$$
C
$$76-88 \mathrm{~MHz}$$
D
$$420-890 \mathrm{~MHz}$$
3
JEE Main 2023 (Online) 11th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A space ship of mass $$2 \times 10^{4} \mathrm{~kg}$$ is launched into a circular orbit close to the earth surface. The additional velocity to be imparted to the space ship in the orbit to overcome the gravitational pull will be (if $$g=10 \mathrm{~m} / \mathrm{s}^{2}$$ and radius of earth $$=6400 \mathrm{~km}$$ ):

A
$$7.9(\sqrt{2}-1) \mathrm{km} / \mathrm{s}$$
B
$$11.2(\sqrt{2}-1) \mathrm{km} / \mathrm{s}$$
C
$$7.4(\sqrt{2}-1) \mathrm{km} / \mathrm{s}$$
D
$$8(\sqrt{2}-1) \mathrm{km} / \mathrm{s}$$
4
JEE Main 2023 (Online) 11th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

When vector $$\vec{A}=2 \hat{i}+3 \hat{j}+2 \hat{k}$$ is subtracted from vector $$\overrightarrow{\mathrm{B}}$$, it gives a vector equal to $$2 \hat{j}$$. Then the magnitude of vector $$\overrightarrow{\mathrm{B}}$$ will be :

A
3
B
$$\sqrt{33}$$
C
$$\sqrt6$$
D
$$\sqrt5$$
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