1
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following are true?

A. Speed of light in vacuum is dependent on the direction of propagation.

B. Speed of light in a medium is independent of the wavelength of light.

C. The speed of light is independent of the motion of the source.

D. The speed of light in a medium is independent of intensity.

Choose the correct answer from the options given below:

A
B and D only
B
B and C only
C
A and C only
D
C and D only
2
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

In a Young's double slit experiment, two slits are illuminated with a light of wavelength $$800 \mathrm{~nm}$$. The line joining $$A_{1} P$$ is perpendicular to $$A_{1} A_{2}$$ as shown in the figure. If the first minimum is detected at $$P$$, the value of slits separation 'a' will be:

JEE Main 2023 (Online) 29th January Morning Shift Physics - Wave Optics Question 21 English

The distance of screen from slits D = 5 cm

A
0.2 mm
B
0.5 mm
C
0.4 mm
D
0.1 mm
3
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

A single current carrying loop of wire carrying current I flowing in anticlockwise direction seen from +ve $$\mathrm{z}$$ direction and lying in $$x y$$ plane is shown in figure. The plot of $$\hat{j}$$ component of magnetic field (By) at a distance '$$a$$' (less than radius of the coil) and on $$y z$$ plane vs $$z$$ coordinate looks like

JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetic Effect of Current Question 33 English

A
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetic Effect of Current Question 33 English Option 1
B
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetic Effect of Current Question 33 English Option 2
C
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetic Effect of Current Question 33 English Option 3
D
JEE Main 2023 (Online) 29th January Morning Shift Physics - Magnetic Effect of Current Question 33 English Option 4
4
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which one of the following statement is not correct in the case of light emitting diodes?

A. It is a heavily doped p-n junction.

B. It emits light only when it is forward biased.

C. It emits light only when it is reverse biased.

D. The energy of the light emitted is equal to or slightly less than the energy gap of the semiconductor used.

Choose the correct answer from the options given below:

A
A
B
B
C
C and D
D
C
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