If you touch a piece of wood and a piece of metal which were kept in the fridge for the same period of time then the result is
A) metal piece is colder than wooden piece
B) wooden piece is colder than metal piece
C) both are at same temperature
D) none

Heat energy will be transferred, when two bodies are placed in thermal contact which are at different temperatures
A) from a body at a lower temperature to a higher temperature
B) from a body at a higher temperature to a lower temperature
C) no transfer of heat energy takes place
D) both A and B are correct

……………… is a measure of thermal equilibrium
A) Temperature
B) Heat
C) Mass
D) None

Three bodies A, B and C are in thermal equilibrium, the temperature of B is 45°C, then the temperature of C is
A) 45° C
B) 50° C
C) 40°C
D) any temperature

Which of the following thermometer scale is also known as an absolute scale of temperature?
A) Celsius scale
B) Fahrenheit scale
C) Kelvin scale
D) None

Kinetic energy of molecules is more in
A) ice at 0°C
B) water at 0° C
C) water at 100° C
D) water vapour at 100° C

The degree of the reluctance of a substance to change its temperature
A) latent heat
B) specific heat
C) kinetic energy
D) heat

The rise in temperature is high for a substance if the maximum share of given heat energy is utilized for increasing its
A) rotational energy
B) potential energy
C) vibrational energy
D) linear kinetic energy

The substance with the highest specific heat is
A) mercury
B) gold
C) ice
D) water

1 Cal/g -°C =
A) 4.2 × 10³J/kg – K
B) 4.2 × 10^-3 J/kg – K
C) 4.2 J
D) 4.2 × 10⁶J/kg – K

If v₂ < v₁ then medium 2 is said to be ……………… with respect to medium 1.

A) denser
B) rarer
C) both
D) neither

Statement x: When a light ray travels from a rarer medium to a denser medium the refracted ray bends towards normal.
Statement y: When a light ray travels from a rarer medium to a denser medium the angle of refraction is less than the angle of incidence.
A) x and y are true
B) x and y are false
C) x is true, y is false
D) x is false, y is true

The speed of light in a vacuum is ……………………
A) 3, 00, 000 kms^-1
B) 3 × 10⁵ kms^-1
C) 3 × 10⁸ ms^-1
D) all

Statement x: Refractive index gives us an idea of how fast or how slow light travels in a medium.
Statement y: The speed .of light in a medium is low when the refractive index of a medium is high.
A) x and y are true
B) x and y are false
C) x is true, y is false
D) x is false, y is true

Statement x: The refractive index of the kerosene is greater than the refractive index of water.
Statement y: An optically denser medium may not possess greater mass density.
A) both x and y are true
B) both x and y are false
C) x is true, y is false
D) x is false, y is true

The ratio of the speed of light in the first medium to the speed of light in the second medium is called …………………..
A) absolute refractive index of the first medium
B) refractive index of 2^nd medium with respect to 1^st medium
C) refractive index of 1^st medium with respect to 2^nd medium
D) all of the above

Which of the following is Snell’s law ?
A) n₁ sin i = sin r/n₂
B) n₁/n₂ = sin r/sin i
C) n₂/n₁ = sin r/sin i
D) n₂ sin i = constant

Which of the following effect is not related to refraction?
A) A coin kept at a bottom of a vessel filled with water appears to be raised
B) A lemon kept in a glass of water appears to be bigger than its size
C) A thick glass slab is placed over some printed letters, they appear raised when viewed through the glass slab.
D) Formation of shadows.

Which of the following diagram shows the ray of light refracted correctly?

In the diagram, identify the angles which are correctly marked?

A) ∠i and ∠r
B) ∠r and ∠e
C) ∠r and ∠e
D) ∠i, ∠r and ∠e

What happens to a ray that travels along the principal axis, strikes a convex surface and passes from a rarer to a denser medium?
A) The ray deviates from its path
B) The ray does not deviate from its path
C) The ray bends towards the normal after refraction
D) The ray bends away from the normal after refraction

The refracted ray ………………. when a ray traveling parallel to the principal axis, strikes a convex surface and passes from denser medium to rarer medium
A) moves towards the principal axis
B) moves away from the principal axis
C) moves parallel to the principal axis
D) moves along the normal

Trace out the correct diagram from the following.

Trace out the correct diagram from the following.

Trace out the correct diagram from the following.

Trace out the correct diagram from the following. When a ray of light travels parallel to the principal axis

Trace out the correct diagram from the following when a ray of light travels parallel to the principal axis.

The formula used when a light ray enters a medium with refractive index n₂ from a medium with refractive index n₁ at a curved surface with a radius of Curvature R is

The formula used when a light ray enters a medium with refractive index n₂ from a medium with refractive index n₁ at plane surface is

A curved surface of radius of curvature R is separating the two media of refractive indices n₁ and n₂. If u and υ are object and image distances respectively, then the relation is

The value of “least distance of distinct vision” at old age ………………..
A) 25 cm
B) infinity
C) 7 to 8 cm
D) 1 to 2 m

Statement X: The value of least distance of distinct vision varies from person to person and with age.
Statement Y: At a young age (i.e below 10 years) the value of least distance of distinct vision is as close as 7to 8 cm due to the muscles around the eye being strong and flexible and can bear more strain.
A) Both X and Y are true
B) Both X and Y are false
C) X is true, Y is false
D) X is false, Y is true

Statement X: The value of least distance of distinct vision does not change with age.
Statement Y: In old age, the muscles cannot sustain more strain hence the value of least distance of distinct vision shifts to a larger value.
A) Both X and Y are true
B) Both X and Y are false
C) X is true, Y is false
D) X is false, Y is true

The angle of vision for a healthy human being is……………….
A) 60°
B) 70°
C) 80°
D) 180°

Statement X : The value of least distance of distinct vision varies from person to person and with age.
Statement Y : The angle of vision varies from person to person and with age.
A) Both X and Y are true
B) Both X and Y are false
C) X is true, Y is false
D) X is false, Y is true

The minimum distance from the eye at which the eye can see the objects clearly and distinctly without any strain is called …………………
A) the maximum distance of distinct vision
B) the average distance of distinct vision
C) the least distance of distinct vision
D) none

The far point of human eye with normal vision lies at ………………..
A) 25 cm
B) 20 cm
C) 0 cm
D) infinity

Name the front part of the eye.
A) cornea
B) iris
C) aqueous humor
D) pupil

Name the part of the eye which is a hole in the middle of the iris …………………
A) eye lens
B) retina
C) iris
D) pupil

The human eye forms the image of an object at its ……………………
A) cornea
B) iris
C) retina
D) eyeball

Statement X: The material which transfers energy from the battery to the bulb is called a conductor
Statement Y: The material which cannot transfer energy from the battery to the bulb is called an insulator.
A) Both statements are true
B) Both statements are false
C) X is true, Y is false
D) X is false, Y is true

The arrangement of the positive ions in a metal conductor is called ……………………
A) free electrons
B) bounded electrons
C) lattice
D) none

The net charge flowing through a crosssection of a conductor in unit time is …………………. when the conductor is in an open circuit.
A) electric current
B) one ampere
C) onecoloumb
D) zero

Which of the following statement is false?
A) When the electrons are in ordered motion, there will be a net charge crossing through any cross-section of the conductor.
B) When the electrons are in random motion, there will be no net charge crossing through any cross-section of the conductor.
C) The positive ions of the metal conductor are fixed in their location.
D) The positive ions of the metal conductor are in motion.

Which of the following statements is not correct?
A) Electric current is ordered motion of charges.
B) The amount of charge crossing any cross-section of the conductor in one second is called electric current.
C) The amount of one coloumb charge crossing any cross-section of the conductor in one second is called one ampere
D) Electric current is the random motion of free electrons in a conductor.

Which of the following V-I graph represents the ohmic conductor ……………………….

Find the resistance of a wire from the V-I graph

A) 10 Ω
B) 20 Ω
C) 30 Ω
D) 1 Ω

The V-I graph of two conductors of resistances and R2 are shown by A and B in the figure. Which is having greater resistance.

A) R₁
B, R₂
C) R₁ = R₂
D) not defined

In case of non-ohmic material, the V-I graph is ……………………

In the figure, the potential at A is ……………………. when the potential at B is zero.

A) 5 V
B) 7 V
C) 2 V
D) 0V