5.5Hz
148.5Hz
200.0Hz
550.0Hz
Correct answer is C
\(\lambda\) = 4L = 4 X 45 = 180cm
F = \(\frac {V}{\lambda}\)
= \(\frac {360}{180 \times 10^{-2}}\)
= 200Hz
The fundamental frequency of vibration of a sonometer wire may be halved by
doubling the length of the wire
doubling the mass of the wire
reducing the tension by half
reducing the absolute temperature by half
Correct answer is A
F \(\alpha\) \(\frac{1}{L}\)
6000m
3000m
1500m
375m
Correct answer is B
t = 4s ; v = 150ms-1
depth = X ; but 2X = vt
X = \(\frac {vt}{2}\) = \(\frac {1500 \times 4}{2}\)
X = 3000m
50.0cm
2.5 cm
0.5cm
0.3cm
Correct answer is D
Y = 0.3 sin(0.5x - 50t) compare with,
y = A sin(kx - wt)
A = 0.3m
The two kettles will cool down at the same rate
the polished kettle cools down more quickly by conduction
the kettle covered with soot cools down more quickly because it is a good radiator
the kettle covered with soot cools down more quickly by the process of heat convection
Correct answer is C
No explanation has been provided for this answer.