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JEE Main Physics: Optics — Chapter Test 1

JEE Main • Physics • Optics • Chapter Test

EasyFREE

15

Questions

20 min

Duration

15

Marks (1 each)

No

Negative marking

Original practice questions with full solutions by ExamPortal.

Instructions

  • • Read each question carefully and pick the correct answer.
  • • You can mark questions for review and come back to them.
  • • Answers are saved automatically.
  • • The test is submitted automatically when time runs out.

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This test is completely free.

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SYLLABUS & QUESTION BLUEPRINT

Sample Practice Questions

Preview 5 sample questions from this 15-question test. Test your knowledge below or take the full exam in timed CBT mode.

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Question 1 of 15
A concave mirror has a radius of curvature of 20 cm. Its focal length is
A
20 cm
B
10 cm
C
40 cm
D
5 cm
View Correct Answer & Step-by-Step Solution
Correct Option:(B)10 cm

Detailed explanation is available inside the official test attempt review.

Question 2 of 15
An object is 30 cm in front of a concave mirror of focal length 10 cm. The image is formed at
A
15 cm in front
B
30 cm in front
C
7.5 cm behind
D
15 cm behind
View Correct Answer & Step-by-Step Solution
Correct Option:(A)15 cm in front

Detailed explanation is available inside the official test attempt review.

Question 3 of 15
Light travels at 2 × 10⁸ m/s in a medium. The refractive index of the medium is
A
1.33
B
1.5
C
2
D
0.67
View Correct Answer & Step-by-Step Solution
Correct Option:(B)1.5

Detailed explanation is available inside the official test attempt review.

Question 4 of 15
Total internal reflection occurs when light goes from
A
rarer to denser at any angle
B
denser to rarer beyond the critical angle
C
denser to rarer below the critical angle
D
rarer to denser beyond the critical angle
View Correct Answer & Step-by-Step Solution
Correct Option:(B)denser to rarer beyond the critical angle

Detailed explanation is available inside the official test attempt review.

Question 5 of 15
The critical angle for a medium of refractive index √2 is
A
30°
B
45°
C
60°
D
90°
View Correct Answer & Step-by-Step Solution
Correct Option:(B)45°

Detailed explanation is available inside the official test attempt review.

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Frequently asked questions

How many questions are there in JEE Main Physics: Optics — Chapter Test 1?

There are 15 questions to answer in 20 min. Each correct answer gives 1 mark, for a total of 15 marks.

Is there negative marking?

No. Wrong answers do not lose marks, so attempt every question.

Is this mock test free?

Yes, it is completely free. Just log in with your email to start.

What does this test cover?

It covers the chapter "Optics" of JEE Main Physics. All questions are original, with a full solution for each.

Will I see my result and the solutions?

Yes. Right after you submit you get your score, accuracy, rank and percentile, and you can review every question with the correct answer and a step-by-step explanation.

Can I take this test again?

Yes, you can retake it as many times as you like and compare your scores.