Q. No.A monochromatic source of light operating at \(15~\text{kW}\) emits \(2.5 \times 10^{22}\) /s
(Take\(h=6.6 \times 10^{-34} ~\text{J/s}\) \(c=3 \times 10^8 ~\text{m/s}\)
1. Microwave
2. Infrared
3. Visible
4. Ultraviolet
(Take
1. Microwave
2. Infrared
3. Visible
4. Ultraviolet
Subtopic: Electromagnetic Spectrum |
Level 4: Below 35%
Please attempt this question first.
Hints
Please attempt this question first.
Match the \(\mathrm{List\text-I}\) with \(\mathrm{List\text-II}\)
Choose the correct answer from the options given below:
1. \(\mathrm{A\text-II,B\text-IV,C\text-III,D\text-I }\)
2. \(\mathrm{A\text-IV,B\text-III,C\text-I,D\text-II }\)
3. \(\mathrm{A\text-IV,B\text-I,C\text-II,D\text-III }\)
4. \(\mathrm{A\text-IV,B\text-II,C\text-I,D\text-III }\)
| \(\mathrm{List\text-I}\) | \(\mathrm{List\text-II}\) | ||
| \(\mathrm{A.}\) | Radio-wave | \(\mathrm{I}.\) | is produced by Magnetron value |
| \(\mathrm{B.}\) | Micro-wave | \(\mathrm{II}.\) | Due to change in the vibrational modes of atoms |
| \(\mathrm{C.}\) | Infrared-wave | \(\mathrm{III}.\) | Due to inner shell electrons moving from higher energy level to lower energy level |
| \(\mathrm{D.}\) | X-ray | \(\mathrm{IV}.\) | Due to rapid acceleration of electrons |
1. \(\mathrm{A\text-II,B\text-IV,C\text-III,D\text-I }\)
2. \(\mathrm{A\text-IV,B\text-III,C\text-I,D\text-II }\)
3. \(\mathrm{A\text-IV,B\text-I,C\text-II,D\text-III }\)
4. \(\mathrm{A\text-IV,B\text-II,C\text-I,D\text-III }\)
Subtopic: Electromagnetic Spectrum |
83%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
A point source is kept at the centre of a spherically enclosed detector. If the volume of the detector increased by \(8\) times, The intensity will:
1. Increased by \(8\) times
2. Increased by \(64\) times
3. Decreased by \(8\) times
4. Decreased by \(4\) times
1. Increased by \(8\) times
2. Increased by \(64\) times
3. Decreased by \(8\) times
4. Decreased by \(4\) times
Subtopic: Electromagnetic Spectrum |
76%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Arrange the following in the ascending order of wavelength \((\lambda)\):
(A) Microwaves \((\lambda_1)\)
(B) Ultraviolet rays \((\lambda_2)\)
(C) Infrared rays \((\lambda_3)\)
(D) X-rays \((\lambda_4)\)
Choose the most appropriate answers from options given below:
1. \(\lambda_3<\lambda_4<\lambda_2<\lambda_1 \)
2. \(\lambda_4<\lambda_2<\lambda_3<\lambda_1\)
3. \(\lambda_4<\lambda_3<\lambda_2<\lambda_1 \)
4. \(\lambda_4<\lambda_3<\lambda_1<\lambda_2\)
(A) Microwaves \((\lambda_1)\)
(B) Ultraviolet rays \((\lambda_2)\)
(C) Infrared rays \((\lambda_3)\)
(D) X-rays \((\lambda_4)\)
Choose the most appropriate answers from options given below:
1. \(\lambda_3<\lambda_4<\lambda_2<\lambda_1 \)
2. \(\lambda_4<\lambda_2<\lambda_3<\lambda_1\)
3. \(\lambda_4<\lambda_3<\lambda_2<\lambda_1 \)
4. \(\lambda_4<\lambda_3<\lambda_1<\lambda_2\)
Subtopic: Electromagnetic Spectrum |
89%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Arrange the following in the ascending order of wavelength :
A. Gamma rays \(\left(\lambda_1\right)\)
B. x-rays \(\left(\lambda_2\right)\)
C. Infrared waves \(\left(\lambda_3\right)\)
D. Microwaves \(\left(\lambda_4\right)\)
Choose the most appropriate answer from the options given below.
1. \(\lambda_4<\lambda_3<\lambda_1<\lambda_2\)
2. \(\lambda_2<\lambda_1<\lambda_4<\lambda_3\)
3. \(\lambda_4<\lambda_3<\lambda_2<\lambda_1\)
4. \(\lambda_1<\lambda_2<\lambda_3<\lambda_4\)
A. Gamma rays \(\left(\lambda_1\right)\)
B. x-rays \(\left(\lambda_2\right)\)
C. Infrared waves \(\left(\lambda_3\right)\)
D. Microwaves \(\left(\lambda_4\right)\)
Choose the most appropriate answer from the options given below.
1. \(\lambda_4<\lambda_3<\lambda_1<\lambda_2\)
2. \(\lambda_2<\lambda_1<\lambda_4<\lambda_3\)
3. \(\lambda_4<\lambda_3<\lambda_2<\lambda_1\)
4. \(\lambda_1<\lambda_2<\lambda_3<\lambda_4\)
Subtopic: Electromagnetic Spectrum |
86%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match the terms of Column-I with the items of Column-II and choose the correct option from the codes given below:
| Column-I | Column-II | ||
| \((\mathrm A)\) | \(X\)-Ray | \((\mathrm P)\) | \(\lambda>700 ~\text{nm} \) |
| \((\mathrm B) \) | \(UV\) Ray | \((\mathrm Q) \) | \(100 ~\text{nm}<\lambda<400 ~\text{nm} \) |
| \((\mathrm C)\) | \(\gamma\)-Ray | \((\mathrm R)\) | \(\lambda<0.3 ~\text{nm} \) |
| \((\mathrm D)\) | Infrared | \((\mathrm S)\) | \(0.3 ~\text{nm}<\lambda<10 ~\text{nm} \) |
| 1. | \(\mathrm {(A) → (S), (B) → (Q), (C) → (P), (D) → (R)} \) |
| 2. | \(\mathrm {(A) → (S), (B) → (Q), (C) → (R), (D) → (P)} \) |
| 3. | \(\mathrm {(A) → (P), (B) → (Q), (C) → (R), (D) → (S)} \) |
| 4. | \(\mathrm {(A) → (P), (B) → (R), (C) → (Q), (D) → (S)} \) |
Subtopic: Electromagnetic Spectrum |
73%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Match List-I with List-II and choose the correct option.
| List-I | List-II | ||
| (A) | Microwave | (p) | \(400 ~\text{nm} – 1 ~\text{nm}\) |
| (B) | Ultraviolet | (q) | \(1 ~\text{nm} – 1 ~\text{pm}\) |
| (C) | X-rays | (r) | \(2.5~\mu\text m – 750~\text{nm}\) |
| (D) | Infrared | (s) | \(1~\text{mm} – 25~\mu \text m\) |
| 1. | \(\mathrm{A\text-(s), B\text-(q), C\text-(r), D\text-(p)}\) |
| 2. | \(\mathrm{A\text-(s), B\text-(p), C\text-(q), D\text-(r)}\) |
| 3. | \(\mathrm{A\text-(p), B\text-(s), C\text-(q), D\text-(r)}\) |
| 4. | \(\mathrm{A\text- (r), B\text- (q), C\text- (s), D\text-(p)}\) |
Subtopic: Electromagnetic Spectrum |
80%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Which of the following electromagnetic waves has the highest energy?
1. \(\mathrm{X} \text-\)rays
2. Infrared
3. Microwaves
4. radio waves
1. \(\mathrm{X} \text-\)rays
2. Infrared
3. Microwaves
4. radio waves
Subtopic: Electromagnetic Spectrum |
84%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
Match the types of radiation listed in Column-I with their corresponding applications in Column-II.
Codes:
| Column-I (Radiation) |
Column-II (Applications) |
||
| (A) | Ultraviolet rays | (I) | Physiotherapy |
| (B) | Infrared rays | (II) | Treatment of cancer |
| (C) | \(\mathrm{X}\)-rays | (III) | LASIK eye surgery |
| (D) | Microwave rays | (IV) | Aircraft navigation |
| 1. | A-IV, B-I, C-III, D-II |
| 2. | A-III, B-I, C-II, D-IV |
| 3. | A-II, B-I, C-IV, D-III |
| 4. | A-III, B-I, C-IV, D-II |
Subtopic: Electromagnetic Spectrum |
75%
Level 2: 60%+
Please attempt this question first.
Hints
Please attempt this question first.
Which is more energetic: an infrared wave or a microwave?
| 1. | infrared wave |
| 2. | microwave |
| 3. | both have the same energy |
| 4. | it cannot be predicted |
Subtopic: Electromagnetic Spectrum |
87%
Level 1: 80%+
Please attempt this question first.
Hints
Please attempt this question first.
© 2026 GoodEd Technologies Pvt. Ltd.