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JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
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A boy pushes a box of mass 2 kg with a force $$\overrightarrow F = \left( {20\widehat i + 10\widehat j} \right)N$$ on a frictionless surface. If the box was initially at rest, then ___________ m is displacement along the x-axis after 10s.
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2
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
Change Language
A radiation is emitted by 1000W bulb and it generates an electric field and magnetic field at P, placed at a distance of 2m. The efficiency of the bulb is 1.25%. The value of peak electric field at P is x $$\times$$ 10$$-$$1 V/m. Value of x is ___________. (Rounded off to the nearest integer) [Take $${\varepsilon _0} = 8.85 \times {10^{ - 12}}$$ C2N$$-$$1 m$$-$$2, c = $$3 \times {10^8}$$ ms$$-$$1]
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3
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
Change Language
A container is divided into two chambers by a partition. The volume of first chamber is 4.5 litre and second chamber is 5.5 litre. The first chamber contain 3.0 moles of gas at pressure 2.0 atm and second chamber contain 4.0 moles of gas at pressure 3.0 atm. After the partition is removed and the mixture attains equilibrium, then, the common equilibrium pressure existing in the mixture is x $$\times$$ 10$$-$$1 atm. Value of x is ________.
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4
JEE Main 2021 (Online) 26th February Morning Shift
Numerical
+4
-1
Change Language
As shown in the figure, a block of mass $$\sqrt 3 $$ kg is kept on a horizontal rough surface of coefficient of friction $${1 \over {3\sqrt 3 }}$$. The critical force to be applied on the vertical surface as shown at an angle 60$$^\circ$$ with horizontal such that it does not move, will be 3x. The value of x will be _________.

[g = 10 m/s2; sin60$$^\circ$$ = $${{\sqrt 3 } \over 2}$$; cos60$$^\circ$$ = $${1 \over 2}$$]

JEE Main 2021 (Online) 26th February Morning Shift Physics - Laws of Motion Question 70 English
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