NSO Level 1- Science Olympiad (SOF) Class 10: Questions 73 - 79 of 1497
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Question 73
Question MCQ▾
Power of a lens is . Which of the following lens is it?
Choices
Choice (4) | Response | |
---|---|---|
a. | Concave lens | |
b. | Convex lens | |
c. | Plane lens | |
d. | All of the above |
Question 74
Question MCQ▾
If the radius of curvature of a lens is , then its focal length is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 75
Question MCQ▾
If an object is at the distance of 25 cm from the plane mirror, then how far its image is formed from the plane mirror?
Choices
Choice (4) | Response | |
---|---|---|
a. | 25 | |
b. | 15 | |
c. | 20 | |
d. | 30 |
Question 76
Question MCQ▾
An object is placed at a distance of from a concave lens of focal length of . The image distance is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | 75 | |
c. | ||
d. |
Question 77
Question MCQ▾
If the focal length of a curved mirror is , then which of the following is correct?
Choices
Choice (4) | Response | |
---|---|---|
a. | Radius of curvature of the mirror is 22 cm | |
b. | Radius of curvature of the mirror is 44 cm | |
c. | The mirror is converging | |
d. | The mirror is diverging |
Question 78
Question MCQ▾
If a ray of light is incident normally in a glass slab, then angle of refraction is:
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 79
Question MCQ▾
An object is placed at the focus of a convex lens. The image will formed:
Choices
Choice (4) | Response | |
---|---|---|
a. | No image is formed | |
b. | Between focal point and centre of lens | |
c. | At radius of curvature of the lens | |
d. | At focal point other side of lens |