A thin glass(refractive index 1.5) lens has optical power of -5D in air.
A thin glass(refractive index 1.5) lens has optical power of -5D in air. Its optical power in a liquid medium with refractive index 1.6 will be
Options
(a) 1 D (b) (-1 D) […]
Questions
An air bubble in a glass slab with refractive index 1.5 (near normal incidence)
An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surface and 3 cm deep when viewed from the opposite face. The thickness […]
If doubly ionised lithium atom is hydrogen like with atomic number 3, the wavelength
If doubly ionised lithium atom is hydrogen like with atomic number 3, the wavelength of radiation required to excite the electron in Li⁺⁺ from the first to the third Bohr orbit and the number of […]
Activity of a radioactive sample decreases to (1/3)rd of its original value
Activity of a radioactive sample decreases to (1/3)rd of its original value in 3 days. Then, in 9 days its activity will become
Options
(a) (1/27) of the original value (b) (1/9) of […]
If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm
If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm, then the ratio of the radius is
Options
(a) (2:1) (b) 1:√2 (c) (1:2) (d) (1:3)
Correct […]
Four identical rods are joined to from a square. If the temperature difference
Four identical rods are joined to from a square. If the temperature difference across one diagonal is 100° C, then temperature difference across another diagonal will be
Options
(a) 100° C (b) 0° […]
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest
A simple pendulum is suspended from the ceiling of a lift. When the lift is at rest its time period is T. With what acceleration should the lift be accelerated upwards in order to reduce […]
The length of second pendulum is 1 m on earth. If mass and diameter
The length of second pendulum is 1 m on earth. If mass and diameter of the planet is double than that of earth, then length becomes
Options
(a) 1 m (b) 2 m […]
Four point masses, each of value m, are placed at the corners of a square ABCD
Four point masses, each of value m, are placed at the corners of a square ABCD of side l. The moment of inertia of this system about an axis through A and parallel to BD […]
The distance travelled by a particle starting from rest and moving
The distance travelled by a particle starting from rest and moving with an acceleration 4/3 ms⁻², in the third second is
Options
(a) 10/3 m (b) 19/3 m (c) 6 m (d) 4 m