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Quiz 10
Mdcat-past-papers - NUMS Quiz
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Board: NUMS |
181. In case of centripetal force, the value of instantaneous acceleration is given by:
ac = v/r
ac = vr
ac = v²/r
ac = v²r
182. A disc, a hoop and a sphere are rolling down from an inclined plane simultaneously, which object will reach at the bottom first?
Hoop
Sphere
Disc
All at the same time
183. The angular form of centripetal force is:
Fc = mw²
Fc = mrw
Fc = mrw²
Fc = mr²w
184. A 2 kg mass in SHM under F = −200x, velocity at mean = 100 m/s. Amplitude?
1 m
10 m
100 m
200 m
185. Number of wavelengths per unit time is:
Speed
Velocity
Displacement
Frequency
186. To make frequency 4× in spring oscillation, we must:
Reduce mass to 1/4th
Make mass 4×
Reduce mass to 1/16th
Double the mass
187. If period of mass M is 1s, period of 16M is:
1 s
2 s
3 s
4 s
188. A 10 kg mass attached to spring (k = 20 N/m), displacement = 20 cm. Acceleration?
2.2 m/s²
4 m/s²
2 m/s²
0.4 m/s²
189. Trough of a wave acts as:
Concave lens
Convex lens
Convex mirror
Plane mirror
190. Crest of wave acts as:
Concave mirror
Convex mirror
Convex lens
Plane mirror
191. The horizontal distance travelled by wave during one complete cycle is called:
Frequency
Wavelength
Amplitude
Time period
192. In transverse wave, the portion above the mean level is called?
Wave front
Wave trough
Wave crest
Wave length
193. The maximum displacement of particle of a medium, on either side of the mean position of a wave is called:
Wavelength
Amplitude
Frequency
Crest
194. A normal person can hear sound waves ranging in frequency from 20Hz to 20kHz. The maximum wavelength is:
17m
17mm
17cm
17km
195. In ripple tank 40 waves pass through a certain point in one second. If the wavelength of the waves is 5cm, then find the speed of wave
2.7m/s
3m/s
2m/s
2m/s
196. The speed of sound is 332ms⁻¹ at 0°C. The speed at 10°C will be
338.1ms⁻¹
333.3ms⁻¹
334.2ms⁻¹
336.4ms⁻¹
197. Loudness of sound is directly related to:
Intensity of sound
Frequency of sound
Wavelength of sound
Pitch of sound
198. The increase in speed of sound in air for each degree rise above 0°C is:
0.4m/s
0.51m/s
0.81m/s
0.61m/s
199. The speed of sound in air does not depend on:
Density of medium
Pressure
Temperature
Moisture
200. In Doppler effect if listener moves towards a stationary source then:
Observed frequency is greater than original frequency
Observed frequency is less than original frequency
Observed frequency is equal to original frequency
Observed frequency is independent of original frequency
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