1
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
The length of a simple pendulum executing simple harmonic motion is increased by $$21\% $$. The percentage increase in the time period of the pendulum of increased length is
A
$$11\% $$
B
$$21\% $$
C
$$42\% $$
D
$$10\% $$
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A body executes simple harmonic motion. The potential energy $$(P.E),$$ the kinetic energy $$(K.E)$$ and total energy $$(T.E)$$ are measured as a function of displacement $$x.$$ Which of the following statements is true ?
A
$$K.E$$ is maximum when $$x=0$$
B
$$T.E$$ is zero when $$x=0$$
C
$$K.E$$ is maximum when $$x$$ is maximum
D
$$P.E$$ is maximum when $$x=0$$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A metal wire of linear mass density of $$9.8$$ $$g/m$$ is stretched with a tension of $$10$$ $$kg$$-$$wt$$ between two rigid supports $$1$$ metre apart. The wire passes at its middle point between the poles of a permanent magnet, and it vibrates in resonance when carrying an alternating current of frequency $$n.$$ The frequency $$n$$ of the alternating source is
A
$$50$$ $$Hz$$
B
$$100$$ $$Hz$$
C
$$200$$ $$Hz$$
D
$$25$$ $$Hz$$
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
The displacement $$y$$ of a wave travelling in the $$x$$-direction is given by $$$y = {10^{ - 4}}\,\sin \left( {600t - 2x + {\pi \over 3}} \right)\,\,metres$$$
where $$x$$ is expressed in metres and $$t$$ in seconds. The speed of the wave - motion, in $$m{s^{ - 1}}$$, is
A
$$300$$
B
$$600$$
C
$$1200$$
D
$$200$$
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