1
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

By what percentage will the transmission range of a TV tower be affected when the height of the tower is increased by $$21 \%$$ ?

A
12%
B
15%
C
10%
D
14%
2
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed across this cross-section. The magnetic field is

A
uniform in the region $$r < a$$ and inversely proportional to distance $$r$$ from the axis, in the region $$r > a$$
B
zero in the region $$r < a$$ and inversely proportional to $$r$$ in the region $$r > a$$
C
directly proportional to $$r$$ in the region $$r < a$$ and inversely proportional to $$r$$ in the region $$r > a$$
D
inversely proportional to $$r$$ in the region $$r < a$$ and uniform throughout in the region $$r > a$$
3
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A planet has double the mass of the earth. Its average density is equal to that of the earth. An object weighing $$\mathrm{W}$$ on earth will weigh on that planet:

A
$$2^{2 / 3} \mathrm{~W}$$
B
W
C
$$2 \mathrm{~W}$$
D
$$2^{1 / 3} \mathrm{~W}$$
4
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A mass $$m$$ is attached to two strings as shown in figure. The spring constants of two springs are $$\mathrm{K}_{1}$$ and $$\mathrm{K}_{2}$$. For the frictionless surface, the time period of oscillation of mass $$m$$ is :

JEE Main 2023 (Online) 6th April Morning Shift Physics - Simple Harmonic Motion Question 11 English

A
$$2\pi \sqrt {{m \over {{K_1} + {K_2}}}} $$
B
$$2\pi \sqrt {{m \over {{K_1} - {K_2}}}} $$
C
$${1 \over {2\pi }}\sqrt {{{{K_1} + {K_2}} \over m}} $$
D
$${1 \over {2\pi }}\sqrt {{{{K_1} - {K_2}} \over m}} $$
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