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The equivalent inductance of two inductors is 2.4 H when connected in parallel and 10 H when connected in series. what is the value of inductance of the individual inductors? The equivalent inductance of two inductors is 2.4 H when connected in parallel and 10 H when connected in series. what is the value of [...]

A woman is standing in front of a plane mirror. What is the minimum mirror height that is necessary for her to see her full image. A woman is standing in front of a plane mirror. What is the minimum mirror height that is necessary for her to see her full image. September 7, 2020 [...]

Two coaxial coil of radii r and R (R>>r ) placed at large seperation x (x>>R). Calculate the magnetic flux passing through coil L1 due to a current I in coil L2. Two coaxial coil of radii r and R (R>>r ) placed at large seperation x (x>>R). Calculate the magnetic flux passing through coil [...]

A source of sound is moving along a circular orbit of radius 3 m with an angular velocity of 10 rad/s. A sound detector located far away from the source is executing linear simple harmonic motion along the line BD with an amplitude An observer standing on a railway crossing receives frequencies 2.2 kHz and [...]

An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the train approaches and recedes from the observer. Find the velocity of the train An observer standing on a railway crossing receives frequencies 2.2 kHz and 1.8 kHz when the train approaches and recedes from the observer. Find the velocity [...]

A source S emitting sound of 300 Hz is fixed on block A which is attached to free end of a spring SA as shown in the figure. The detector D fixed on block B attached to the free end of spring SB detects this sound. a passenger standing on the station platform hears beats [...]

Two train whistles have identical frequencies of 180 Hz. When one train is at rest in the station and the other is moving nearby, a passenger standing on the station platform hears beats with a frequency of 2.00 beats/s a passenger standing on the station platform hears beats with a frequency of 2.00 beats/s Two [...]

The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 dB and (b) 10.0 dB? The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 [...]

A source of sound having natural frequency f0 = 1800 Hz is moving uniformly along a line separated from a stationary listener by a distance l = 250 m. The velocity of source is n = 0.80 times the velocity of sound. Find: A train approaching a railway crossing at a speed of 120 km/h [...]

A train approaching a railway crossing at a speed of 120 km/h sounds a short whistle at frequency 640 Hz when it is 300 m away from the crossing. The speed of sound in air is 340 m/s. What will be the A train approaching a railway crossing at a speed of 120 km/h sounds [...]