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Give reason that ultrasonics not be produced by passing high frequency alternating current by a loud speaker
At these high frequencies, inductive reactance is so high where is no current flows throughout the coil of the loud speaker and therefore ultrasonic waves cannot be produced.
It is an instrument used to view pure spectrum. It makes dispersion without deviation with the help of n crown prisms and (n - 1½ flint prisms alternately arranged in a tabular str
A resistor is a two-terminal electrical or electronic component that resists an electric current by producing a voltage drop between its terminals in the accordance with ohm’s law.
hearts observation
An object is thrown downward from a 150 cliff so that it makes an angle of 30 with the horizontal. (a) How fast will it be going when it hits the ground? (b) How long will it take
The atomic weight of an element is double its atomic number. If there are four electrons in 2P orbital, the element is : (1) C (2) N (3) O
TIME OF FLIGHT: "It is the total time for which the projectile remains in air". As, the body goes up and comes back to similar level, so it does not cover vertical distance,
State and illustrate Lenz's law with examples Derive a mathematical expression for a force between two parallel conductors carrying a current.
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Explain the Ray Diagrams for Mirrors? To figure out the position and size of an image reflected by a curved mirror, you can draw a scaled diagram of the mirror as follows: along
list the factors used to classify inductors.
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