Description : As the temperature of the air increases from 0 degrees C to 20 degrees C, the wavelength of a sound made by a tuning fork of fixed frequency does which of the following? Does the wavelength w) increase x) decrease y) remain the same z) increase up to a maximum, then remain constant
Last Answer : ANSWER: W -- INCREASE
Description : A source produces sound waves under water. Waves travel through water and then into air. Which of the following statements about the frequency (f) and the wavelength () is correct and sound passes from ... increases. (3) remains unchanged but f decreases. (4) remains unchanged but f increases.
Last Answer : 3) remains unchanged but f decreases.
Description : If viewed on an oscilloscope, the loudness of a sound wave would be associated with the wave's: w) frequency x) wavelength y) velocity z) amplitude
Last Answer : ANSWER: Z -- AMPLITUDE
Description : An object moving in a circle of radius ‘r’ with a constant speed ‘v’ has a constant acceleration towards the center equal to A. v²⁄r B. v⁄r C. v²×r D. v×r
Last Answer : v²⁄r
Description : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant velocity v=2m/s towards right. Given
Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with ... P_(2) = 32 J//s` D. None of these
Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant ... `16 N` C. `24 N` D. `32 N`
Last Answer : In the figure shown, a conducting wire PQ of length l=1m, is moved in a uniform magnetic field B=4T with constant ... `0` B. `2A` C. `4A` D. `6A`
Description : If frequency of certain wave is f, then it's velocity is A. v = fλ B. v = T⁄λ C. T2 D. 1⁄T2
Last Answer : v = fλ
Description : The crack of a bullwhip results from the bullwhip's tip: w) approaching the speed of sound x) exceeding the speed of sound y) moving with constant velocity z) none of the above
Last Answer : ANSWER: X -- EXCEEDING THE SPEED OF SOUND
Description : In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : - a) Constant power mode b) Constant torque mode c) Constant slip mode d) Variable power and variable torque mode
Last Answer : In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : - Constant torque mode
Description : 10. Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field? -Science
Last Answer : The direction of the magnetic field can be determined using the Fleming’s Left hand rule. The direction of the magnetic field will be perpendicular to the direction of current and the direction ... it can be concluded that the direction of the magnetic field inside the chamber is downward.
Description : A ball is moving with a speed v towards north, collides with an identical ball, moving with the same speed towards east. After the collision, the two balls stick together and move towards north –east. The speed of the combination is (a) 2v (b) 3v (c) v (d) v/2
Last Answer : Ans:(c)
Description : What is the frequency of a wave with a velocity of 100 ms and a wavelength of 20m?
Last Answer : Feel Free to Answer
Description : Of the following properties of a wave, the one that is independent of the other is its (a) Amplitude (b) Velocity (c) Wavelength (d) Frequency
Last Answer : Ans:(a)
Description : An instrument has two strings. Both have the same length and are uniform. One of the strings is under twice as much tension as the other and also twice the mass of the other. Then which of ... d) Both strings vibrate with the same frequency and have the same wave-length and the same wave velocity.
Last Answer : Ans:(d)
Description : A travelling wave passes a point of observation where the time interval between successive crests is 0.2 s. Which of the following is then true? (a) The wavelength is 5 m (b) The wavelength is 0.2 m (c) The velocity of propagation is 5 m/s (d) The frequency of 5 Hz.
Description : The fundamental characteristic of all waves are (a) Wavelength (b) Frequency (c) Velocity (d) All the above
Description : What is the relation between wavelength, frequency and velocity? (1) velocity of wave = frequency * wavelength (2) velocity of wave = frequency/wavelength (3) velocity of wave = wavelength/frequency (4) None of above
Last Answer : a) velocity of wave = frequency * wavelength
Description : Of the following properties of a wave, the one that is independent of the other is its (1) amplitude (2) velocity (3) wavelength (4) frequency
Last Answer : (1) amplitude Explanation: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Description : When a light wave is reflected from a mirror, there is a change in its – (1) frequency (2) amplitude (3) wavelength (4) velocity
Last Answer : (2) amplitude Explanation: When a light wave is reflected from an object, it changes not only its amplitude but also its phase according to the properties of the object at a particular point. The velocity and momentum are just reversed in another direction.
Last Answer : a) amplitude Explanation: The maximum extent of a vibration or oscillation, measured from the position of equilibrium.
Description : Bolometer is used to measure – (1) Frequency (2) Temperature (3) Velocity (4) Wavelength
Last Answer : (2) Temperature Explanation: A bolometer is a device for measuring the power of incident electromagnetic radiation via the heating of a material with a temperature-dependent electrical resistance. IL was ... , connected to a thermal reservoir (a body of constant temperature) through a thermal link.
Description : Speed in a given direction A. Wavelength B. Frequency C. Velocity D. Waves per second
Last Answer : A. Wavelength
Description : The inverse of wavelength is referred to as: w) wave number x) frequency y) velocity z) momentum
Last Answer : ANSWER: W -- WAVE NUMBER
Description : The frequency of a wave is 50 Hertz and its wavelength is 25 meters. What is the velocity of this wave?
Last Answer : ANSWER: 1250 METERS/SECOND
Description : When a light wave is reflected from a mirror, there is a change in its (1) frequency (2) amplitude (3) wavelength (4) velocity
Last Answer : amplitude
Description : Bolometer is used to measure (1) Frequency(2) Temperature (3) Velocity (4) Wavelength
Last Answer : Temperature
Description : The loudness of sound depends upon (1) Velocity (2) Pitch (3) Amplitude (4) Wavelength
Last Answer : (3) Amplitude Explanation: Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude).
Description : A particle of mass M moves towards right with a velocity 2 V along the x-axis and another of mass 2 M with a velocity V towards left (- x axis). After the collision (they stick together on colliging) ... a.come to rest b.107 dynes c.move towards right d.may move in any direction e.move towards left
Last Answer : c. move towards right
Description : Which of the following statement is an interpretation of the SIGMET? LSAW SWITZERLAND 0307 SIGMET 2 VALID 030700/031100 LSSW mod to sev cat fcst north of alps btn fl 260 and fl 380 / ... towards the area north of the Alps. Intensity increasing. Pilots advised to cross this area above FL260
Last Answer : c. Moderate to severe clear air turbulence to be expected north of the Alps. Intensity increasing. Danger zone between FL260 and FL380
Description : Loudness of sound depends on – (1) Frequency (2) Wavelength (3) Amplitude (4) Pitch
Last Answer : (3) Amplitude Explanation: Loudness depends on the amplitude of the sound wave. The larger the amplitude the more energy the sound wave contains therefore the louder the sound. The pitch of a note depends on the frequency of the source of the sound.
Description : Which among the following determines the pitch of a sound? (1) Amplitude (2) Frequency (3) Loudness (4) Wavelength
Last Answer : (2) Frequency Explanation: The pitch of a sound is determined by the frequency of vibration of the sound waves So higher the frequency the higher is the pitch.
Description : Which of the following property of sound is affected by change in air temperature – (1) Frequency (2) Intensity (3) Amplitude (4) Wavelength
Last Answer : (4) Wavelength Explanation: The wavelength of sound changes with temperature. This is because the speed of sound changes with the temperature. Since the speed of sound is different at different temperature, this ... while the same tone in fresh water at 68°F would have a wavelength of 48.05 feet.
Description : What is the wavelength in millimeters of a sound wave whose frequency is 35 KILOHERTZ. Assume the speed of sound is 350 METERS PER SECOND? w) 100 millimeters x) 1,000 millimeters y) 10 millimeters z) 1/10 millimeters
Last Answer : ANSWER: Y -- 10 MILLIMETERS
Description : Which of the following property of sound is affected by change in air temperature (1) Frequency (2) Intensity (3) Amplitude (4) Wavelength
Last Answer : Wavelength
Description : Loudness of sound depends on (1) Frequency (2) Wavelength (3) Amplitude (4) Pitch
Last Answer : Amplitude
Description : The speed of any mechanical wave as it propagates through a medium is dependent mainly on the A. frequency of the wave source B. wavelength C. period of the wave D. type of medium through which the wave travels E. amplitude
Last Answer : D. type of medium through which the wave travels
Description : As a source of sound approaches a stationary listener, the apparent wavelength: w) increases x) decreases y) stays the same.
Last Answer : ANSWER: X -- DECREASES
Description : When light is traveling through a vacuum, what is the product of the light's wavelength and frequency equal to? w) speed of light x) Plank's constant y) momentum z) wave number
Last Answer : ANSWER: W -- SPEED OF LIGHT
Description : In Newton's rings experiment, if monochromatic source of light is replaced by another monochromatic source of higher wavelength. What will be the effect on radius (or diameter)? (a) Radius (or ... be no effect (d) Radius (or diameter) will remain constant but there will be more brightness
Last Answer : (b) Radius (or diameter) will increase
Description : If a river flows from west to east with constant velocity of 1.0 m s-1 and a boat leaves south bank heading towards north with velocity of 2.40 m s-1, then resultant velocity of boat is A. 2.6 m s-1 B. 2.7 m s-1 C. 2.8 m s-1 D. 2.9 m s-1
Last Answer : 2.6 m s-1
Description : As the ball falls towards the ground, its velocity A. increases B. decreases C. remains constant D. becomes zero
Last Answer : increases
Description : A charge q is moving with a velocity `v_(1)=1hati` m/s at a point in a magentic field and experiences a force `F=q[-hatj+1hatk]` N. If the charge is m
Last Answer : A charge q is moving with a velocity `v_(1)=1hati` m/s at a point in a magentic field and experiences a force `F ... `(hat(i)+hat(j)-hat(k))Wb//m^(2)`
Description : Water jet coming out of a stationary horizontal tube at speed v strikes horizontally a massive wall moving in opposite with same speed. Water come to
Last Answer : Water jet coming out of a stationary horizontal tube at speed v strikes horizontally a massive wall ... energy of water jet striking the wall is zero
Description : Two protons are projected simultaneously from a fixed point with the same velocity v into a region, magnetic there exists a uniform magnetic field. Th
Last Answer : Two protons are projected simultaneously from a fixed point with the same velocity v into a region, magnetic there ... mv)/(qB)` D. `(mv)/(2qB)`
Description : Stopping distance of vehicles : When brakes are applied to a moving vehicle, the distance it travels before stopping is called stopping distance. It is an important factor for road safety and depends on ... the brake with the deceleration of 5m/s2. Find the stopping distance of the car -Science
Last Answer : Here u=72 km/hr = 72×10003600m/s=2072×10003600m/s=20 m/s , v=0 a= -5 m/s2 Now using the relation v2=u2+2asv2=u2+2as 0=(20)2+2×(−5)×s0=(20)2+2×(−5)×s s=40ms=40m
Description : A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies? -Physics 9th
Last Answer : hope its clear
Description : A particle of mass m and charge Q moving with a velocity v enters a region on uniform field of induction B Then its path in the region is s
Last Answer : A particle of mass m and charge Q moving with a velocity v enters a region on uniform field of induction B ... . circular,If `v.B=0` D. None of these
Description : A proton and an electron both moving with the same velocity v enter into a region of magnetic field directed perpendicular to the velocity of the part
Last Answer : A proton and an electron both moving with the same velocity v enter into a region of magnetic field ... be higher D. their orbital radii will be same