131.

Which of the following is not a vector quantity?

• Momentum

• Displacement

• Torque

• Speed

Which of the following is not a vector quantity?

• Acceleration

• Electric Current

• Force

• Velcoity

The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called .............

• banking of roads

• cornering of roads

• elevation of roads

• tempering of roads

The bending of light when it passes around a corner or a slit is due to...............

• reflection

• refraction

• diffraction

• total internal reflection

What is the reason for formation of Mirage in desert?

• Refraction of light

• Reflection of light

• Total internal reflection of light

• Both Refraction and Total internal reflection of light

It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?

• Law of inertia

• Netwon's second law

• Newton's third law

• Pascal's law

Which one of the following is not a property of electromagnetic waves?

• Electromagnetic waves do not show interference and diffraction.

• Oscillating electric field and magnetic field are perpendicular to each other.

• Electromagnetic waves are transverse waves.

• Electromagnetic waves do not require a medium to propagate.

Convex mirror is generally used in

• solar cookers

• opthalmoscope

• reflector for head light

• rear view mirror

What is the S.I. unit of frequency?

• Newton

• Watt

• Farad

• Hertz

Speed of light is maximum in..............

• vacuum

• solids

• liquids

• gases