1.
Two lenses of focal lengths +15 cm and –10 cm are in contact. Equivalent focal length is:
2.
The orbital speed of satellite is independent of:
3.
Critical angle for glass (μ = 1.5) in air is:
4.
Total internal reflection occurs when light:
5.
First law of thermodynamics is a statement of conservation of:
6.
Efficiency of Carnot engine working between 500 K and 300 K:
7.
Two wavelengths λ₁ and λ₂ are used in Young’s experiment. Fringe width:
8.
Which law is violated when heat flows from cold to hot body naturally?
9.
A convex mirror always forms:
10.
Specific heat at constant pressure (Cp) is always ___ than at constant volume (Cv):
11.
Gravitational potential energy of a body of mass m at height h from Earth's surface is:
12.
Gravitational force between two point masses is:
13.
The refractive index of a medium is 2. What is speed of light in it? (c = 3 × 10⁸ m/s)
14.
In an isothermal process, the internal energy change is:
15.
In an isochoric process:
16.
In a concave mirror, image is virtual, erect, and larger than object. The object is placed:
17.
A geostationary satellite has a time period of:
18.
A gas undergoes adiabatic expansion. Which of the following is true?
19.
A convex lens has focal length 20 cm. When object is placed 30 cm in front, image is:
20.
A person can see distant objects clearly but not near ones. He has:
21.
Gravitational potential at Earth's surface is –6.4 × 10⁷ J/kg. Energy needed to move 10 kg to infinity:
22.
One mole of ideal gas is compressed isothermally from V to V/2. Work done is:
23.
Image formed by plane mirror is:
24.
Zeroth law of thermodynamics defines:
25.
A satellite moves in circular orbit around Earth. Work done by gravitational force is:
26.
In adiabatic compression, the temperature of a gas:
27.
For a reversible isothermal expansion of an ideal gas:
28.
The relation between orbital speed v and escape velocity ve is:
29.
Power of a concave lens of focal length 50 cm is:
30.
A ray of light passes from glass (μ = 1.5) to water (μ = 1.33). What happens?
31.
The angular width of central maximum in single slit diffraction is:
32.
Acceleration due to gravity at depth d is:
33.
If Earth shrinks to half its radius without mass change, g on surface becomes:
34.
Work done in a cyclic process is equal to:
35.
In a thermodynamic process, 600 J of heat is supplied and 200 J of work is done by gas. Change in internal energy?
36.
An object is placed at 2f in convex lens. The image is:
37.
Escape velocity on a planet of mass M and radius R is:
38.
The time period of a satellite orbiting close to Earth’s surface depends on:
39.
A satellite in circular orbit has kinetic energy:
40.
The efficiency of Carnot engine increases if:
41.
Value of g is maximum at:
42.
If a satellite’s total mechanical energy is E, its potential energy is:
43.
A prism deviates light because of:
44.
An ideal gas has Cp – Cv = R. This implies:
45.
Weightlessness in a satellite occurs because:
