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When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s . The speed of the source is
29
Oct
When a source moves away from a stationary observer, the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s . The speed of the source is the frequency is 6/7 times the original frequency. Given: speed of sound =330 m/s. The speed of the source is When a source moves away [...]
Conducting wire of parabolic shape, initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0,B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire, then correct statements (s) is/are
29
Oct
Conducting wire of parabolic shape, initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0,B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire, then correct statements (s) [...]
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B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire ,
Conducting wire of parabolic shape ,
initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0 ,
then correct statements (s) is/are ,
Four identical charges Q are fixed at the four corners of a square of side a. The electric field at a point P located symmetrically at a distance a/ root 2 from the centre of the square is
29
Oct
Four identical charges Q are fixed at the four corners of a square of side a. The electric field at a point P located symmetrically at a distance a/ root 2 from the centre of the square is Four identical charges Q are fixed at the four corners of a square of side a. The [...]
In a sports meet the timing of a 200 m straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun fired at the starting point. The time recorded will be more accurate
29
Oct
In a sports meet the timing of a 200 m straight dash is recorded at the finish point by starting an accurate stop watch on hearing the sound of starting gun fired at the starting point. The time recorded will be more accurate October 29, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , [...]
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q, they hang in equilibirum as shown. We now increase the charge on the left pith ball from Q to 2Q while leaving its mass essentially unchanged. Which of he following diagrams best represent the new equilibrium configuration?
29
Oct
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q, they hang in equilibirum as shown. We now increase the charge on the left pith ball from Q to 2Q while leaving its mass essentially unchanged. Which of he following diagrams best represent [...]
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A positive point charge 50 muC is located in the plane xy at a point with radius vector r0 = 2i + 3j . THe electric field vector E at a point with radius vector r = 8 i - 5 j ,
is ,
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q ,
where r0 and r are expressed in meter ,
A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity v1 = 30 m/s The apparent frequency varies with time as shown in figure. Velocity of sound v=300 m/s. Then which of the following is incorrect?
29
Oct
A stationary observer receives a sound from a sound of frequency v0 moving with a constant velocity v1 = 30 m/s The apparent frequency varies with time as shown in figure. Velocity of sound v=300 m/s. Then which of the following is incorrect? October 29, 2020 Category: Cengage JEE Mains Physics by B.M Sharma , [...]
A train is moving in an elliptical orbit in anticlockwise sense with a speed of 110 m/s. Guard is also moving in the given direction with same speed as that of train. The ratio of the length of major and minor axes is 4/3. Driver blows a whistle of 1900 Hz at P, which is received by guard at S. The frequency received by guard is (velocity of sound v=330 m/s)
29
Oct
A train is moving in an elliptical orbit in anticlockwise sense with a speed of 110 m/s. Guard is also moving in the given direction with same speed as that of train. The ratio of the length of major and minor axes is 4/3. Driver blows a whistle of 1900 Hz at P, which is [...]
A boy is walking away from a well at a speed of 1.0m/s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340m/s , what is the frequency of the whistle is
29
Oct
A boy is walking away from a well at a speed of 1.0m/s in a direction at right angles to the wall. As he walks, he below a whistle steadily. An observer towards whom the boy is walking hears 4.0 beats per second. If the speed of sound is 340m/s , what is the frequency [...]
Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μA current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an Ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and current in the Ohm’s law experiment with R = 1000 Ω resistor by using an ideal cell. Which of the following statements is/are correct?
29
Oct
Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μA current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an Ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and [...]
A sound wave of frequency n travels horizontally to the right with speed with speed c. It is reflected from a broad wall moving to the left with speed v. The number of beats heard by a stationary observer to the left of the wall is
29
Oct
A sound wave of frequency n travels horizontally to the right with speed with speed c. It is reflected from a broad wall moving to the left with speed v. The number of beats heard by a stationary observer to the left of the wall is a person standing at a point O on a [...]
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a person standing at a point O on a road perpendicular to the track hears a sound of frequency f. The distance of O from A at that time is 4m. If the original frequency is 640Hz ,
A source of sound is travelling at 100/3 m/s along a road ,
then the value of f is (given velocity of sound = 340m/s) ,
towards a point A. When the source is 3m away from A ,