Science Practice Quiz 93

Q1.The magnification produced by a spherical mirror is defined as the ratio of which two quantities?

A. Height of the object to the height of the image B. Image-distance to the object-distance C. Height of the image to the height of the object D. Focal length to the radius of curvature

Q2.When a light ray travels obliquely from a denser medium to a rarer medium, how does it bend?

A. Towards the normal B. Away from the normal C. Along the normal D. It does not bend

Q3.What is the approximate speed of light in vacuum?

A. 3 × 10^5 m s^-1 B. 3 × 10^6 m s^-1 C. 3 × 10^7 m s^-1 D. 3 × 10^8 m s^-1

Q4.The refractive index of a transparent medium is defined as the ratio of which two speeds?

A. Speed of light in the medium to that in vacuum B. Speed of light in vacuum to that in the medium C. Speed of light in air to that in water D. Speed of light in glass to that in air

Q5.Which of the following equations correctly represents the lens formula for a spherical lens?

A. 1/v + 1/u = 1/f B. 1/u - 1/v = 1/f C. 1/v - 1/u = 1/f D. 1/f + 1/v = 1/u

Q6.What is the SI unit for the power of a lens?

A. Metre B. Candela C. Dioptre D. Watt

Q7.Which one of the following materials cannot be used to make a lens?

A. Water B. Glass C. Plastic D. Clay

Q8.For a concave mirror, if the image formed is observed to be virtual, erect, and larger than the object, where should the object be positioned?

A. Between the principal focus and the centre of curvature B. At the centre of curvature C. Beyond the centre of curvature D. Between the pole of the mirror and its principal focus

Q9.To obtain a real image of the same size as the object using a convex lens, where should the object be placed?

A. At the principal focus of the lens B. At twice the focal length C. At infinity D. Between the optical centre of the lens and its principal focus

Q10.Which type of mirror consistently produces an erect image, regardless of the object's distance?

A. Only plane mirror B. Only concave mirror C. Only convex mirror D. Either plane or convex mirror

Sign in with Email

Science Practice Quiz 93