# Physics - MCQS with answers - Part I

## Physics - MCQS with answers - Part I

Q1. Which are the materials generally used in electrical operations in electronics?

a) Iron and tin
d) Aluminium and iron

Q2.Consider the following sentences "Concave lens always forms ______ "

A) Erect, virtual and smaller image.
B) Inverted ,real and bigger image.
C) Straight , virtual and bigger image.
D) Bended, real and smaller image.

ANSWER: A) Erect, virtual and smaller image.

Concave lens always form erect ,virtual and smaller image than the object.

Q3.Which one of the following is printed on a commonly used fluorescent tubelight?

a) 220k
b) 273k
c) 6500k
d) 9000k

White light is commonly described by it's color temperature .A traditional incandescent light source's color temperature is determined by comparing its hue with a theoretical black body radiator. The lamp's color temperature is the temperature in kelvin at which the heated black body radiator matches the hue of the lamp.

Q4.A pendulum of a given length takes always the same time to complete one oscillation. This observation was made by a very famous scientist name ______

a) Isaac Newton
b) Hans Christian Oersted
c) Galileo Galilie
d) Thomas Edison

Q5.When all the parallel rays reflected from a plane surface are not parallel.

1) The reflection is known as Diffused reflection.
2) The reflection is known as infused reflection.
3) The reflection is known as regular reflection.
4) The reflection is known as irregular reflection

Choose the correct statements :

A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4

Q6.Consider the following statements

1.The motion of the moon around the earth is due to the Centripetal force.
2.The centripetal force is provided by the force of attraction of the earth.
3. All the objects in the universe attracts each other by the frictional force.
4.Attractional force between the objects is proportional to their masses .

Choose the correct statements

a) 1,2 and 4
b) 1,2 and 3
c) 2 and 4
d) 3 only

All the objects in the universe attracts each other by the force of attraction between objects called Gravitational Force.

Q7.What is reflection of light?

A) The angle of incidence is unequal to the angle of reflection .
B) The angle of refraction is equal to the angle of incidence.
C) Law of reflection are applicable only on plane surfaces.
D) The angle of incidence is equal to the angle of reflection.

ANSWER: D) The angle of incidence is equal to the angle of reflection.

The incident ray ,the normal to the mirror at the point of incidence and
the reflected ray all lie in the same line and thus they are equal.

Q8. Which type of mirrors are used by Dentists to see an enlarged image of the teeth?

1) Concave
2) Convex

A)1 and 2
B)only 1
C)only 2
D)None

Q9.The force acting on an object perpendicular to the surface is called

a) Pressure
b) Thrust
c) Both of above
d) None

Q10.Angle of incidence is equal to the angle of reflection.

a) Always
b) Sometimes
c) Under special conditions
d) Never