Physics, 23.07.2019 07:30 reginaakerson230

What type of modulation is typically used by broadcasting stations to transmit pictures on television screens? amplitude frequency phase pulse

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Answer from: j015

The answer is AMPLITUDE

Answer from: andersonkee2657

The correct answer is amplitude modulation.

Explanation:

Amplitude modulation is the modulation in which the amplitude of the carrier wave is varied with the input signal. To deliver video signal on television screen, the amplitude modulation is used.

Frequency modulation is the modulation in which the frequency of the carrier wave is varied with the input signal. To deliver audio signal on the television screen, the frequency modulation is used.

Therefore, the amplitude modulation is used by broadcasting stations to transmit pictures on television screen.

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

Answer from: Quest

Iwould have to say sorry i can't elaborate more. hope this though!

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