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SSC Scientific Assistant EC: Quiz 5

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Question 1

Area under a unit impulse function is

Question 2

One end of a steel pipe of length 660 m is struck a blow. A listener at the other end hears sound at an interval of 1.89 seconds, one from the wave that has travelled along the metal portion and the other from the wave that has travelled through air. If the density of steel is 8 x 10³ kg/m³ and the velocity of sound in air is 330 m/s, find the Bulk modulus of elasticity of steel.

Question 3

When two sound waves are superimposed, beats are produced when they have

Question 4

Two lenses of power + 12 D and – D are in contact. The focal length of the combination is

Question 5

Cathode rays have velocity

Question 6

Planck’s work was connected with

Question 7

If the electron in a hydrogen atom jumps from the third orbit to the second orbit, the emitted radiation has wavelength (R is the Rydberg’s constant)

Question 8

……………. coupling is generally employed inpower amplifiers.

Question 9

A consumer is connected to an alternating voltage. The power consumed is measured with the help of wattmeter. Which of the following powers is indicated by the wattmeter?

Question 10

The full adder can be constructed using two-hall adders and one

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ESE & GATE EC General

Jun 8ESE & GATE EC