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Two capacitors C1 = C2 = C are connected with a battery of emf e as shown in figure. The switch S is open for a long time and then closed. Two capacitors C1 = C2 = C are connected with a battery of emf e as shown in figure. The switch S is open [...]

If the sound level in a room is increased from 50 dB to 60 dB, by which factor is the pressure amplitude increased ? by which factor is the pressure amplitude increased ? If the sound level in a room is increased from 50 dB to 60 dB November 7, 2020 Category: Uncategorised (JEE Advanced [...]

For the network of capacitors as shown in figure. (a) Find the potential of junction B, ( b) Find the potential of junction D, (c) Find the charge on 2 muF capacitor . ( b) Find the potential of junction D (c) Find the charge on 2 muF capacitor . For the network of capacitors [...]

A stationary source of sound is emitting sound of frequency 500Hz. Two observers A and B lying on the same line as the source, observe frequencies 480Hz and 530Hz respectively. The velocity of A and B respectively are (in m/s), speed of sound =300 m/s. A stationary source of sound is emitting sound of frequency [...]

A string 2.0m long and fixed at its ends is driven by a 240 Hz vibrator. The string vibrates in its third harmonic mode. The speed of the wave and its fundamental frequency is? A string 2.0m long and fixed at its ends is driven by a 240 Hz vibrator. The string vibrates in its [...]

A sound differs by 6 dB from a sound of intensity equal to 10 nW/cm^2. Find the absolute value of intensity of the sound. A sound differs by 6 dB from a sound of intensity equal to 10 nW/cm^2. Find the absolute value of intensity of the sound. November 7, 2020 Category: Uncategorised (JEE Advanced [...]

Two cars A and B are moving away from each other in opposite directions. Both the cars are moving with a speed of 20ms^−1 with respect to the ground. If an observer in car A detects a frequency 2000 Hz of the sound coming from car B, what is the natural frequency of the sound [...]

Two sound waves from two different sources interfere at a point to yield a sound of varying intensity. The intensity level between the maximum and minimum is 20 dB. What is the Two sound waves from two different sources interfere at a point to yield a sound of varying intensity. The intensity level between the [...]

A point A is located at a distance r = 1.5 from a point source of sound of frequency 500 Hz. The power of the source is 0.9 W. Speed of sound in air is 360 m/s and density of air A point A is located at a distance r = 1.5 from a point [...]

The pressure wave, P = 0.01 sin [1000t – 3x] Nm^−2 , corresponds to the sound produced by a vibrating blade on a day when atmospheric temperature is 0°C. On some other day, when temperature is T, the speed of sound produced by the same blade and at the same frequency is found to be [...]