Q.42. Light ray incident along a vector AO(AO=2-3) emerges out along vector OB(OB=C-4) as shown in the figure below. The value of C is

Sol. $$\frac{|AO \times \hat{j}|}{|AO|}$$ = $$\frac{|OB \times \hat{j}|}{|OB|}$$ × 1.5 $$\frac{|2\hat{k}|}{\sqrt{13}}$$ = $$\frac{|C\hat{k}|}{\sqrt{C^2+16}}$$ $$\frac{4}{13}$$ = $$\frac{9C^2}{4(C^2+16)}$$ ⇒ 16C² + 256 = 117C² 256 = 101 C² C = 1.59 ≈ 1.6

What is the correct answer for JEE Main Physics Q42?

The correct answer is A. Sol. $$\frac{|AO \times \hat{j}|}{|AO|}$$ = $$\frac{|OB \times \hat{j}|}{|OB|}$$ × 1.5 $$\frac{|2\hat{k}|}{\sqrt{13}}$$ = $$\frac{|C\hat{k}|}{\sqrt{C^2+16}}$$ $$\frac{4}{13}$$ = $$\frac{9C^2}{4(C^2+16)}$$ ⇒ 16C² + 256 = 117C² 256 = 101 C² C = 1.59 ≈ 1.6

Q.42. Light ray incident along a vector AO(AO=2-3) emerges out along vector OB(OB=C-4) as shown in the figure below. The value of C is

The correct answer is A. Sol. $$\frac{|AO \times \hat{j}|}{|AO|}$$ = $$\frac{|OB \times \hat{j}|}{|OB|}$$ × 1.5 $$\frac{|2\hat{k}|}{\sqrt{13}}$$ = $$\frac{|C\hat{k}|}{\sqrt{C^2+16}}$$ $$\frac{4}{13}$$ = $$\frac{9C^2}{4(C^2+16)}$$ ⇒ 16C² + 256 = 117C² 256 = 101 C² C = 1.59 ≈ 1.6

JEE Main 2026 Physics PYQ · With Answer · Free

JEE Main•Physics•MCQs

Q.42. Light ray incident along a vector AO(AO=2$$\hat{i}$$-3$$\hat{j}$$) emerges out along vector OB(OB=C$$\hat{i}$$-4$$\hat{j}$$) as shown in the figure below. The value of C is

Choose an option

More from JEE Main

View all →

Q.51. The ratio of mass percentage (w/w) of C : H in a hydrocarbon is 12 : 1. It has two carbon atoms. The weight (in g)

JEE MainChemistry

Q.52. The first and second ionization constants of a weak dibasic acid are and respectively. 0.1 mol of was dissolve

JEE MainChemistry

Q.53. is isostructural with : Choose the correct answer from the options given below:

JEE MainChemistry

Q.56. At , 20.0 mL of 0.2 M weak monoprotic acid HX is titrated against 0.2 M NaOH. The pH of the solution (a) at the st

JEE MainChemistry

Q.57. Consider the reaction , for which the rate constant at is . Which of the following statements are true? A. When c

JEE MainChemistry

Q.58. The correct set that contains all kinds (basic, acidic, amphoteric and neutral) of oxides is :

JEE MainChemistry

Browse Engineering Questions by Subject

Chemistry(145)Mathematics(122)

Practice More JEE Main Questions

Explore more questions and study resources

Engineering Papers Study Resources

Related Questionsin Physics

More from JEE Main

Browse Engineering Questions by Subject

Practice More JEE Main Questions