PHYSICS

What type of electromagnetic wave is used in the transmission of cell phone signals?

• Ultraviolet

• Radio Waves

• Visible Light

• Infrared

How will you distinguish radio reception from radio transmission?

• Radio reception is the complete reverse of radio transmission.

• Radio reception is the same as radio transmission.

• Radio reception is entirely different from radio transmission.

• Radio reception and radio transmission are both done by radio stations.

Which electromagnetic wave has the highest frequency?

• GAMMA RAYS

• X-RAY

• RADIO

• VISIBLE LIGHT

Which electromagnetic wave has the highest frequency?

• Gamma

• Radio

• Visible light

• X-ray

Who formulated the theory which states that an oscillating electric current should be capable of radiating energy in the form of electromagnetic waves?

• ALESSANDRO VOLTA

• MICHAEL FARADAY

• HANS CHRISTIAN OERSTED

• JAMES CLERK MAXWELL

Which of the following is an INCORRECT application of microwaves?

• Microwaves are used in radar.

• Microwaves are used for cooking.

• Microwaves are used in sterilizing water.

• Microwaves are used in satellite communications.

Which device converts electrical signal into sound?

• Microphone

• Radio transmitter

• Antenna

• Loud speaker

What type of mirror do dentists usually use to see virtual, erect and enlarged image of our teeth?

• convex

• concave

• plane

• none of the above

An object is located between the center of curvature and its focal point in a concave mirror. What is the type and orientation of the image formed?

• Real and inverted

• Real and erect

• Virtual and inverted

• Virtual and erect

What will happen to the light rays as it passes through the optical center of a lens?

• It will be refracted

• It will pass through at an angle

• It will pass through undeviated

• It will be dispersed