1
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements:

Statement I : A truck and a car moving with same kinetic energy are brought to rest by applying breaks which provide equal retarding forces. Both come to rest in equal distance.

Statement II : A car moving towards east takes a turn and moves towards north, the speed remains unchanged. The acceleration of the car is zero.

In the light of given statements, choose the most appropriate answer from the options given below

A
Statement I is incorrect but Statement II is correct.
B
Statement $$\mathrm{I}$$ is correct but Statement II is incorrect.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
2
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

LIST I LIST II
A. Spring constant I. $$\mathrm{[T^{-1}]}$$
B. Angular speed II. $$\mathrm{[MT^{-2}]}$$
C. Angular momentum III. $$\mathrm{[ML^2]}$$
D. Moment of inertia IV. $$\mathrm{[ML^2T^{-1}]}$$

Choose the correct answer from the options given below:

A
A-IV, B-I, C-III, D-II
B
A-II, B-III, C-I, D-IV
C
A-II, B-I, C-IV, D-III
D
A-I, B-III, C-II, D-IV
3
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Given below are two statements: one is labelled as Assertion $$\mathbf{A}$$ and the other is labelled as Reason $$\mathbf{R}$$

Assertion A : EM waves used for optical communication have longer wavelengths than that of microwave, employed in Radar technology.

Reason R : Infrared EM waves are more energetic than microwaves, (used in Radar)

In the light of given statements, choose the correct answer from the options given below.

A
Both $$\mathrm{A}$$ and $$\mathrm{R}$$ are true but $$\mathrm{R}$$ is NOT the correct explanation of $$\mathrm{A}$$
B
$$\mathrm{A}$$ is true but $$\mathrm{R}$$ is false
C
Both $$\mathrm{A}$$ and $$\mathrm{R}$$ are true and $$\mathrm{r}$$ is the correct explanation of $$\mathrm{A}$$
D
$$\mathrm{A}$$ is false but $$\mathrm{R}$$ is true
4
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

In an n-p-n common emitter (CE) transistor the collector current changes from 5 $$\mathrm{mA}$$ to $$16 \mathrm{~mA}$$ for the change in base current from $$100~ \mu \mathrm{A}$$ and $$200 ~\mu \mathrm{A}$$, respectively. The current gain of transistor is __________.

A
210
B
0.9
C
9
D
110
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