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Two tuning forks A and B having a frequency of 500 Hz each are placed with B to the right of A. An observer in between the forks is moving towards B with a speed of 25 m/s. Two tuning forks A and B having a frequency of 500 Hz each are placed with B [...]

Figure shows a capacitive circuit , with a switch Sw. a. What is the potential difference between a and b when the switch is open? Figure shows a capacitive circuit with a switch Sw. a. What is the potential difference between a and b when the switch is open? November 7, 2020 Category: Uncategorised (JEE [...]

A siren emitting a sound of frequency 2000 Hz moves away from you towards a cliff at a speed of 8 m/s. (a) What is the frequency of the sound you hear coming directly from the siren. A siren emitting a sound of frequency 2000 Hz moves away from you towards a cliff at a [...]

An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60 m/s towards a hill from which an echo is heard. Calculate the frequency of the echo heard by the driver. An engine blowing a whistle of frequency 133 Hz moves with a velocity of 60 m/s towards a hill from [...]

A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m(m A heavy ball of mass M is suspended from the ceiling of a car by a light string of mass m(m November 7, 2020 Category: Chapter 10 - Oscillation and Waves , JEE Mains [...]

A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer is f1 . If the speed of the train is reduced to 17 m/s, the frequency registered is f2 . If speed of sound is 340 m/s, then the ratio f1/f2 is [...]

Two capacitors C1andC2 are connected with two batteries of emf ε1 and ε2. The circuit components are connected with a switch S as shown in. Initially the switch is open and the capacitors are charged. Find the heat produced when switch S is closed. C2 and C3 are arranged as shown in figure. Determine the [...]

A musician using and open flute of length 50 cm produces second harmonic sound waves. A person runs towards the musician from another end of a hall at a speed of 10 km/h from the second end of room. If the wave speed is 330 m/s, the frequency heard by the running person will be [...]

T Two capacitors of capacitances 1μF and 2μF are charged to potential differnces 20V and 15V as shown in. If terminals B and C connected together and terminals A and D are connected with the positive and negative ends of the battery, respectively, then find the final charges on both the capacitors. C2 and C3 [...]

Three capacitors of capacitances 1μF,2μF, and 2μF, are cahrged up to the potential difference 30V,10V, and 15V, respectivly. If terminal A is connected with DC is connected with E and F is connected eith B, the find the charge flow in the ciruit and the final charge on the capacitors. 10V 2μF and 15V and [...]