If two parallel lines are cut by a transversal, then each pair of corresponding angle are . a.equal b.obtuse c.acute d.90^0

Answers 1

equal

lines which are parallel to the same line are parallel to each other

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The efficiency of a thermal power plant improves with a.increased quantity of coal burnt b.larger quantity of water used c.lower load in the plant d.use of high steam pressures

Answer:

thermal efficiency increases with the increase in temperature and pressure of steam entering the turbine. Therefore, we can say that use of high steam pressure can improve efficiency as a thermal power plant. ∴ The correct option is D. to 38% .

What is the photon flux and photon density at 2 m from the lamp? a.5.9 x 10^14 photons cm^-2, 2 x 10^4 photons cm^-2 b.2 x 10^4 photons cm^-2, 5.9 x 10^14 photons cm^-2 c.5.9 x 10^10 photons cm^-2, 2 x 10^3 photons cm^-2 d.2 x 10^3 photons cm^-2, 5.9 x 10^10 photons cm^-2

b.2 x 10^4 photons cm^-2, 5.9 x 10^14 photons cm^-2..

In a clock, what is the time period of meeting of the minute hand and the second hand? a.59 s b.60/59s c.59/60s d.3600/59s

Answer:

Correct option is D

3600/59s

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Answer:

The Correct Answer Is b. 60/59s

Explanation:

Angular velocity of minute hand,

ωmin=2π60 rad min−1

Angular velocity of second hand,

ωsec=2π1 rad min−1

For second and minute hand to meet again

θsec−θmin=2π

⇒

(ωsec−ωmin)

T=2π

⇒

2π

(1−160)

T=2π

⇒

T=60/59 min

A device that converts high frequency current into electromagnetic wave. a.Antenna b.Loudspeaker c.Microphone d.Transducer

Answer:

A device that converts high frequency current into electromagnetic waves is an antenna.

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A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer, that is, a device that converts an electrical audio signal into a corresponding sound.

microphone is a device that translates sound vibrations in the air into electronic signals and scribes them to a recording medium or over a loudspeaker. Microphones enable many types of audio recording devices for purposes including communications of many kinds, as well as music vocals, speech and sound recording

transducer is an electronic device that converts energy from one form to another. Common examples include microphones, loudspeakers, thermometers, position and pressure sensors, and antenna.

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