1
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
$$200$$
2
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A tuning fork of known frequency $$256$$ $$Hz$$ makes $$5$$ beats per second with the vibrating string of a piano. The beat frequency decreases to $$2$$ beats per second when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was
A
$$256 + 2Hz$$
B
$$256 - 2Hz$$
C
$$256 - 5Hz$$
D
$$256 + 5Hz$$
3
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
If the electric flux entering and leaving an enclosed surface respectively is $${\phi _1}$$ and $${\phi _2},$$ the electric charge inside the surface will be
A
$$\left( {{\phi _2} - {\phi _1}} \right){\varepsilon _0}$$
B
$$\left( {{\phi _2} + {\phi _1}} \right)/{\varepsilon _0}$$
C
$$\left( {{\phi _1} - {\phi _2}} \right)/{\varepsilon _0}$$
D
$$\left( {{\phi _1} + {\phi _2}} \right){\varepsilon _0}$$
4
AIEEE 2003
MCQ (Single Correct Answer)
+4
-1
A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A
decreases
B
remains unchanged
C
becomes infinite
D
increases
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