1
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following

{Assume negligible air friction}

A
Metal ball will reach the earth's surface earlier than the insulating ball
B
Both will reach the earth's surface simultaneously.
C
Insulating ball will reach the earth's surface earlier than the metal ball
D
Time taken by them to reach the earth's surface will be independent of the properties of their materials
2
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R

Assertion A : The beam of electrons show wave nature and exhibit interference and diffraction.

Reason R : Davisson Germer Experimentally verified the wave nature of electrons.

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

A
A is not correct but R is correct.
B
Both A and R are correct and R is the correct explanation of A
C
Both A and R are correct but R is Not the correct explanation of A
D
A is correct but R is not correct
3
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The effect of increase in temperature on the number of electrons in conduction band ($$\mathrm{n_e}$$) and resistance of a semiconductor will be as:

A
$$\mathrm{n}_{\mathrm{e}}$$ decreases, resistance increases
B
Both $$\mathrm{n}_{\mathrm{e}}$$ and resistance increase
C
$$\mathrm{n}_{\mathrm{e}}$$ increases, resistance decreases
D
Both $$\mathrm{n}_{\mathrm{e}}$$ and resistance decrease
4
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following correctly represents the variation of electric potential $$(\mathrm{V})$$ of a charged spherical conductor of radius $$(\mathrm{R})$$ with radial distance $$(\mathrm{r})$$ from the center?

A
JEE Main 2023 (Online) 31st January Morning Shift Physics - Electrostatics Question 49 English Option 1
B
JEE Main 2023 (Online) 31st January Morning Shift Physics - Electrostatics Question 49 English Option 2
C
JEE Main 2023 (Online) 31st January Morning Shift Physics - Electrostatics Question 49 English Option 3
D
JEE Main 2023 (Online) 31st January Morning Shift Physics - Electrostatics Question 49 English Option 4
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