Question
A wave is represented as $e = 10\sin ({10^8}t + 6\sin 1250t)$ then the modulating index is

Answer

d
(d) Comparing with standard equation.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A solid sphere of mass $2\, kg$ is resting inside a cube as shown in the figure. The cube is moving with a velocity $v = (5t\,\hat i + 2t\,\hat j)m/s$. Here t is the time in second. All surface are smooth. The sphere is at rest with respect to the cube. ........... $N$  is the total force exerted by the sphere on the cube. (Take $g = 10\, m/s^2$)
A person is observing two trains one coming towards him and other leaving with the same  speed $4\, m/s$. If their whistling frequencies are $240\, Hz$ each, then the number of  beats per second heard by the person will be:(if velocity of sound is $320\, m/s$)
A man of mass $100\,kg$. is standing on a platform of mass $200\,kg$. which is kept on a smooth ice surface. If the man starts moving on the platform with a speed $30\,m / sec$ relative to the platform then calculate with what velocity relative to the ice the platform will recoil $..........m/s$
The $r.m.s.$ speed of a certain gas is v at $400\,K.$ The temperature at which the $r.m.s.$ speed becomes two times, will be ...... $K$
Mercury is filled in a tube of radius $2 \ cm$ up to a height of $30 \ cm$. The force exerted by mercury on the bottom of the tube is $..........N. \ ($Given, atmospheric pressure $=10^5 Nm ^{-2},$ density of mercury $=1.36 \times 10^4 \ kg m ^{-3}, g=10 ms^{-2}, \pi=\frac{22}{7})$
The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy $6 eV$ fall on it is $4 eV$. The stopping potential in volts is
Refer to the circuit shown. What will be the total power dissipation in the circuit if $P$ is the power dissipated in $R_1$ ? It is given that $R_2=4 R_1$ and $R_3=12 R_1$ are .......... $P$
A curved in a level road has a radius $75\, m$. The maximum speed of a car turning this curved road can be $30 \,m / s$ without skidding. If radius of curved road is changed to $48\, m$ and the coefficient of friction between the tyres and the road remains same, then maximum allowed speed would be .........$m / s$.
A circular coil having $200$ turns, $2.5 \times 10^{-4} \mathrm{~m}^2$ area and carrying $100 \mu \mathrm{A}$ current is placed in a uniform magnetic field of $1 \mathrm{~T}$. Initially the magnetic dipole moment $(\vec{M})$ was directed along $\vec{B}$. Amount of work, required to rotate the coil through $90^{\circ}$ from its initial orientation such that $\overrightarrow{\mathrm{M}}$ becomes perpendicular to $\vec{B}$, is. . . . $\mu \mathrm{J}$.
Two masses $m_1 = 3\,kg$ and $m_2 = 7\,kg$ tied to a string are hanging over a light frictionless pulley. What is the acceleration of the masses when system is free to move ? $[g = 10\,m/s^2]$  ...... $m/s^2$