abhinaysingh525

For which Diode is used? (1) modulation (2) oscillation (3) amplification (4) purification

by

For which Diode is used ?  (1) modulation  (2) oscillation  (3) amplification  (4) purification  Answer: (4) The most common function of a diode is to allow an electric current to pass in one direction (called the diode’s forward direction), while blocking current in the opposite direction (the reverse direction).This unidirectional behavior is called recti fication or … Read more

Who among the following developed the technology of under ground nuclear explosion ?

by

Who among the following developed the technology of underground nuclear explosion?  (1) Dr. Homi J. Bhabha  (2) Dr. Vikram Sarabhai  (3) Dr. Raja Ramanna  (4) Dr. P. K. Iyengar  Answer: (1) Homi Jehangir Bhabha was an Indian nuclear physicist, founding director, and professor of physics at the Tata Institute of Fundamental Research. Colloquially known as “father … Read more

Which among the following types of coal produces most heat per unit ?

by

Which among the following types of coal produces the most heat per unit?  (1) Coal  (2) Lignite  (3) Anthracite  (4) Pit  Answer: (3) The heat content of anthracite ranges from 22 to 28 million Btu per short ton (26 to 33 MJ/kg) on a moist, mineral-matter-free basis. Anthracite (“coal-like”) is a hard, compact variety of mineral … Read more

Which among the following waves is used for communication by artificial satellites ?

by

Which among the following waves is used for communication by artificial satellites?  (1) Microwaves  (2) Radio waves  (3) A. M.  (4) Frequency of 1016 series  Answer: (1) For fixed (point-to-point) services, communications satellites provide a microwave radio relay technology complementary to that of communication cables. They are also used for mobile applications such as communications to … Read more

What is found in frequency modulation ?

by

 What is found in frequency modulation?  (1) Fixed frequency  (2) Fixed dimension  (3) Change in frequency and dimension  (4) Change in dimension only  Answer: (1) Frequency modulation (FM) conveys information over a carrier wave by varying its instantaneous frequency. This contrasts with amplitude modulation, in which the amplitude of the carrier is varied while its frequency … Read more

When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?

by

When the speed of the car is doubled, then what will be the braking force of the car to stop it at the same distance?  (1) four times  (2) two times  (3) half  (4) one-fourth Answer: (1) Brake force, also known as Brake Power, is a measure of braking power of a vehicle. Suppose a car … Read more

The dimension of which of the following is the same as that of impulse ?

by

The dimension of which of the following is the same as that of impulse?  (1) Volume  (2) Momentum  (3) Torque  (4) Change in the rate of momentum  Answer: (2) The quantity of impulse is force × time interval. In classical mechanics, linear momentum or translational momentum is the product of the mass and velocity of an … Read more

Which among the following is the fundamental quantity ?

by

Which among the following is the fundamental quantity?  (1) Volume  (2) Time  (3) Velocity  (4) Force  Answer: (2). The fundamental qualities of Physics are the seven basic quantities that can be used to express all other physical quantities. These are as follows: Length: Metre, Heat: Kelvin, Time: second, Luminous Intensity: Candela, Mass: Kilogram, Electric Current: Ampere, … Read more