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The decibel (abbreviated dB) is the unit used to measure the intensity of a sound. The decibel scale is a little odd because the human ear is incredibly sensitive. Our ears can hear everything from your fingertip.brushing lightly over your skin to a loud jet engine. The decibel (dB) is a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference level.
When heated from 0° to 10°C volume of a given mass of water will -
Which of the following is caused due to the Newton’s first law of motion?
I. When a motorcar makes a sharp turn at a high speed, we tend to ...
What type of rays are used in a CT scan to visualize the internal structures of the human body?
A transistor works as an amplifier only when:
A toroid has a core (non-ferromagnetic) of inner radius 23 cm and outer radius 28 cm, around which 4000 turns of a wire are wound. If the current in th...
An athlete can jump farther by running before jumping due to which type of inertia?
Two identical piano wires have same fundamental frequency when kept under the same tension. What will happen if tension of one of the wire is slightly i...
Newton’s second law of motion primarily explains which of the following?
A dielectric is pulled out of a charged capacitor (battery disconnected). The potential difference:
What is the value of acceleration due to gravity at the center of the earth?
