MCQ
The mass of the electron varies with
- AThe size of the cathode ray tube
- BThe variation of $‘g’$
- ✓Velocity
- DSize of the electron
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${V}_{{m}}({t})=10 \sin \left(2 \pi \times 10^{5} {t}\right)$ $volts$ and
Carrier signal
${V}_{{c}}({t})=20 \sin \left(2 \pi \times 10^{7} {t}\right)$ $volts$
The modulated signal now contains the message signal with lower side band and upper side band frequency, therefore the bandwidth of modulated signal is $\alpha\, {kHz}$. The value of $\alpha$ is :