# Physics Quiz For Class 10

- Question of
## Radius of curvature of a plane mirror is

- Zero
- Infinity
- Finite but very large
- 25 cm

- Question of
## Image formed by a plane mirror is

- Real and erect
- Real and inverted
- Virtual and erect
- Virtual and inverted

- Question of
## Spherical mirrors are made from

- Section of a sphere
- Section of a circle
- Section of a cone
- Section of a cylinder

- Question of
## The radius of curvature of a spherical mirror is 50 cm. It’s focal length is

- 25 cm
- 40 cm
- 50 cm
- 100 cm

- Question of
## An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be

- 0.25 m
- 1.0 m
- 0.5 m
- 0.5

- Question of
## The angle of incidence for a ray of light having zero reflection angle is

- 0
- 30 degree
- 45 degree
- 90 degree
- 90 degree

- Question of
## For a real object, which of the following can produce a real image

- plane mirror
- concave mirror
- concave lens
- convex mirror

- Question of
## Which of the following mirror is used by a dentist to examine a small cavity

- convex mirror
- plane mirror
- concave mirror
- combination of convex and concave mirror

- Question of
## Which one of the following materials cannot be used to make a lens

- glass
- plastic
- clay
- None

- Question of
## Find the focal length of a lens of power -2.0 D

- – 0.5 m
- 0.5 m
- -0.2 m
- 0.2 m

- Question of
## where should an object be placed in front of a convex lens to get a real image of the size of the object

- at the principal focus of the lens
- at twice the focal length
- at infinity
- between the optical center of the lens and it’s principal focus.

- Question of
## Speed of light in vacuum

- 3 x 10^9 m/s
- 3 x 10^8 m/s
- 3 x 10^8 ms
- 2 x 10^8 ms
- 2 x 10^8 ms

- Question of
## Find the focal length of lens for power = +1.5 D

- 0.55 m
- 0.66 m
- 0.25 m
- 0.15 m
- 0.15 m

- Question of
## A double concave lens is simply called a

- convex lens
- lens
- concave lens
- concave mirror

- Question of
## Physics is defined as:

- The study of plants, animals, and nature
- Develped out of efforts of man trying to explain our physical environment.
- Developed out of efforts of man trying to understand space and astronomy
- Is the science of the human body

- Question of
## Name 2 famous physicist:

- Dmitri Mendeleev
- sir Isaac Newton
- Galileo Galilei
- Both B and C

- Question of
## What is the definition of displacement?

- An object that is lost without any scientifically explained reason
- A vector that points from an object’s initial position to its funal position and has a magnitude that equals the shortest distance between two points
- A vector that points from an object’s initial position to its funnel position and has a magnitude that equals the greatest distance between two points
- Both B and C

- Question of
## ______________ does not reveal about the direction of the motion. To describe how fast an object moves and the direction of its motion, we need the vector concept of _____________

- speed , velocity
- distance , time
- speed , time
- displacement, velocity

- Question of
## Power is defined as

- the something that enables an object to do work.
- how much force an object has.
- the rate at which work is done.
- energy due to the position of something.

- Question of
## The product of a force and the length of time the force is applied to an object is called , and it causes a change in its momentum.

- velocity
- interval
- impulse
- work

- Question of
## When an object is in free fall,

- its speed stays the same.
- it decelerates
- it accelerates.
- none of the above.

- Question of
## When light rays strike a surface, they bounce off in a process called

- reflection
- refraction
- interference
- diffraction

- Question of
## The First Law of Thermodynamics helps you to understand the

- conservation of entropy.
- conservation of energy.
- enthalpy.
- perpetual motion.

- Question of
## The word rate is a clue that something is being time.

- divide by
- multiply by
- added to
- subtract from

- Question of
## If you move 50 meters in 10 seconds, what is your speed?

- 50m/s
- 15m/s
- 0.5m/s
- 5m/s

- Question of
## The first law of thermodynamics states that

- components of a system interact.
- entropy of a closed system always increases.
- a closed system always shifts toward disorder or homogeneity.
- energy is always conserved.

- Question of
## Torque is a measure of a force’s tendency to produce

- linear motion
- freefall motion
- rotational motion
- momentum

- Question of
## When two objects try to pull each other this is

- Gravity
- Force
- Gravitational Force
- All of the Above

- Question of
## The unit of acceleration is

- Meter squared per second
- Meter squared per second squared
- Meter per second
- Meter per second squared
- Meter per second squared

- Question of
## What makes mass different from weight?

- Gravity
- Force
- Acceleration
- Kilo