An organ pipe closed at one end is 80cm long. Determine the frequency of the fundamental note assuming that the speed of sound in air is 340ms\(^{-1}\)
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FUTO Post UTME Physics Past Questions
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In a resonance tube experiment, the effective of the air column for the first resonance is 20cm when set into vibration by a tuning fork of frequency 480Hz. Neglecting end effect the velocity of sound in air is
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When light is incident on an object which is magenta in colour, which of the following colours would be absorbed?
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For a short sighted person, light rays from a point on a very distant object are focused
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What must be the distance between an object and a converging lens of focal length 20cm to produce an erect image two times the object height?
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A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from
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An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is
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Shadows and eclipses result from the
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A wave disturbance traveling in air enters a medium in which its velocity is less than that in air. Which of the following statements is true about the wave in the medium?
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A light wave of frequency 5 \(\times\) l0\(^{14}\)Hz moves through water which has refractive index of \(\frac{4}{3}\). Calculate the wavelength in water if the velocity of light in air is 3 \(\times\) 10\(^8\)ms\(^{-1}\…
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The photocell works on the principle of the
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A substance has a half life of 3mm. After 6 min, the count rate was observed to be 400. What was its count rate at zero time?
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What precaution should a manufacturer take to ensure that energy loss in a transformer is minimized?
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A 0 - 1 OmA galvanometer with a coil resistance of 3052 can be converted to a 0-10mA ammeter by using
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A lamp is rated 240V, 60W. The resistance of the filament is
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Electrical power is transmitted at a high voltage rather than low voltage because the amount of energy loss is due to
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Which of following is most suitable for protecting the circuit of 2000W electric iron connected to a 250y mains?
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Which the following is an essential physical property of the wires used for making fuse?
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The total energy required to send a unit positive charge round a complete electrical circuit is the
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When a known standard resistor of 2.0 is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?
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