1
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 0.2 weber/m2. The coil carries a current of 2 A. If the plane of the coil is inclined at an angle of 30o with the direction of the field, the torque required to keep the coil in stable equilibrium will be
A
0.24 Nm
B
0.12 Nm
C
0.15 Nm
D
0.20 Nm
2
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
A string is stretched between fixed points separated by 75.0 cm. It is observed to have resonant frequencies of 420 Hz and 315 Hz. There are no other resonant frequencies between these two. The lowest resonant frequency for this string is
A
10.5 Hz
B
105 Hz
C
155 Hz
D
205 Hz
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
4.0 g of a gas occupies 22.4 litres at NTP. The specific heat capacity of the gas at constant volume is 5.0 J K$$-$$1 mol$$-$$1. If the speed of sound in this gas at NTP is 952 m s$$-$$1, then the heat capacity at constant pressure is
(Take gas constant R $$=$$ 8.3 J K$$-$$1 mol$$-$$1)
A
7.0 J K$$-$$1 mol$$-$$1
B
8.5 J K$$-$$1 mol$$-$$1
C
8.0 J K$$-$$1 mol$$-$$1
D
7.5 J K$$-$$1 mol$$-$$1
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Change Language
The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone of an organ pipe open at both the ends. The length of organ pipe open at both the ends is
A
120 cm
B
140 cm
C
80 cm
D
100 cm
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