In communications system, the process of superimposing a low frequency signal on a high frequency wave is known as

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In communications system, the process of superimposing a low frequency signal on a high frequency wave is known as

Repeater
Modulation
Attenuation
Demodulation

Solution: The correct answer is B. Modulation

Modulation is the process of superimposing a signal on a high-frequency wave that functions as a carrier and changing its amplitude, frequency, or phase.

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The refractive index of glass is $1.5$ . What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$ .

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b $\frac{1}{2 \pi} \frac{1}{\sqrt{1 C}}$
c $\frac{1}{2 \mathrm{z}} \sqrt{\frac{1}{\mathrm{LC}}-\frac{\mathrm{R}^{2}}{\mathrm{~L}^{2}}}$
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More Material

The refractive index of glass is $1.5$ . What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$ .

Consider interference between two sources of intensities I and 4I. What will be the intensity at points where phase differences are:

Write two points of difference between interference and diffraction.

The phase difference between the current and voltage at resonance is
A 0
B $\pi / 2$
C $\pi_{1}$
D $-\pi$

State whether the following is true or false: The magnetic field inside a long circular coil carrying current will be parallel straight lines.

Derive an expression for electric potential at a point due to an electric dipole. Discuss the special cases.

Derive an expression for the potential at a point due to a short dipole. Hence show what will be the potential at an axial and an equatorial point :

Find out the wavelength at which a black body at temperature $700 \mathrm{~K}$ emits maximum energy

How does concave lens correct myopia?
A Increases the curvature of the eye lens
B Forms the image of the object at the retina
C Decreases the elongation of the eyeball
D All of the above Correct option is (B) Forms the image of the object at the retina

A microscope will have maximum resoving power, if to illuminate the specimen, it uses light of

In balanced metre bridge 5Ω is connected in the left gap and RΩ in the right gap. When RΩ is shunted with an equal resistance, the new balance point is at 1.6 l1 where ‘l1 is the earlier balancing length. The value of ‘l1is

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