1
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Out of Syllabus
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A circuit is arranged as shown in figure. The output voltage V0 is equal to ................... V.

JEE Main 2021 (Online) 27th August Morning Shift Physics - Semiconductor Question 75 English
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2
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
First, a set of n equal resistors of 10 $$\Omega$$ each are connected in series to a battery of emf 20V and internal resistance 10$$\Omega$$. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 20 times, then the value of n is ............... .
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3
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Out of Syllabus
Change Language
Two cars X and Y are approaching each other with velocities 36 km/h and 72 km/h respectively. The frequency of a whistle sound as emitted by a passenger in car X, heard by the passenger in car Y is 1320 Hz. If the velocity of sound in air is 340 m/s, the actual frequency of the whistle sound produced is .................. Hz.
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4
JEE Main 2021 (Online) 27th August Morning Shift
Numerical
+4
-1
Change Language
If the velocity of a body related to displacement x is given by $$\upsilon = \sqrt {5000 + 24x} $$ m/s, then the acceleration of the body is .................... m/s2.
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