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Two pulses in a stretched string whose c...

Two pulses in a stretched string whose centres are initially 8 cm apart are moving towards each other as shown in the figure. The speed of each pulse is 2 cm/s. After 2 second, the total energy of the pulses will be

A

zero

B

purely kinetic

C

purely potential

D

partly kinetic and partly potential

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • Two pulse in a stretched string whose centers are initially 8cm apart are moving towards each other as shown in the figure. The speed of each pulse is 2cm//s . After 2seconds , the total energy of the pulse will be

    A
    zero
    B
    purely kinetic
    C
    purely potential
    D
    partly kinetic and partly potential

  • Two pulses are travelling along a string in opposite directions towards each other as shown in the figure. If the wave velocity is 2cm//s and the pulses are 6 cm apart, then after 1.5 sec , the energy stored in the string will be (Assume shapes of pulses to be similar)

    A
    kinetic energy only
    B
    potential energy only
    C
    kinetic energy as well as potential energy
    D
    none of these

  • Two long wires are placed parallel to each other 10cm apart as shown in figure. The magnetic field at point P is

    A
    `5//6xx10^(-3)T` directed perpendicular into the paper
    B
    `1//3xx10^(-3)T` directed perpendicular out of the paper
    C
    `5//6xx10^(-3)T` directed perpendicular out of the paper
    D
    `1//6 xx10^(-3)T` directed perpendicular into the paper
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