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According to maxwell’s hypothesis , a changing electric field gives rise to
08
Sep
According to maxwell’s hypothesis , a changing electric field gives rise to a changing electric field gives rise to According to maxwell's hypothesis September 8, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
A man can swim in still water at a speed of 3 km/h. he want to cross a river that flows at 2 km/h and reach the point directly opposite to his starting point. In which direction should he try to swim . How much time will he take to cross the river if the is 500 m wide ?
08
Sep
A man can swim in still water at a speed of 3 km/h. he want to cross a river that flows at 2 km/h and reach the point directly opposite to his starting point. In which direction should he try to swim . How much time will he take to cross the river if the [...]
A man crosses a 320 m wide river perpendicular to the current in 4 min. If in still water he can swim with a speed 5/3 times that of the current, then the speed of the current, in m/min is
08
Sep
A man crosses a 320 m wide river perpendicular to the current in 4 min. If in still water he can swim with a speed 5/3 times that of the current, then the speed of the current, in m/min is A man crosses a 320 m wide river perpendicular to the current in 4 min. [...]
The speed of boat is 5 Km/h in still water. It crosses a river of width 1 Km along shortest possible path in 15 min. The velocity of river water is
08
Sep
The speed of boat is 5 Km/h in still water. It crosses a river of width 1 Km along shortest possible path in 15 min. The velocity of river water is The speed of boat is 5 Km/h in still water. It crosses a river of width 1 Km along shortest possible path in 15 [...]
Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs. (a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space). (b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen, known as Lamb shift). (c) 2.7 K [temperature associated with the isotropic radiation filling all space-thought to be a relic of the ‘big-bang’ origin of the universe]. (d) 5890Aˆ−5896Aˆ (double lines of sodium] (e) 14.4keV energy of a particular transition in .57Fe nucleus associated with a famour high resolution spectroscopic method (mossbauer spectroscopy).
08
Sep
Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs. (a) 21 cm (wavelength emitted by atomic hydrogen in interstellar space). (b) 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen, known as Lamb shift). [...]
A river 500 m wide is flowing at a rate of 4 m/s. A boat is sailing at a velocity of 10 m/s with respect to the water, in a direction perpendicular to the river. The time taken by the boat to reach the opposite bank
08
Sep
A river 500 m wide is flowing at a rate of 4 m/s. A boat is sailing at a velocity of 10 m/s with respect to the water, in a direction perpendicular to the river. The time taken by the boat to reach the opposite bank A river 500 m wide is flowing at a [...]
About 5 percent of the power of a 100 W light bulb is converted to visible radiation. what is the average intensity of visible radiation a) at a distance of 1 m from the bulb ? b) at a distance of 10 m ? assume that the radition is emitted isotrophically and neglect reflection.
08
Sep
About 5 percent of the power of a 100 W light bulb is converted to visible radiation. what is the average intensity of visible radiation a) at a distance of 1 m from the bulb ? b) at a distance of 10 m ? assume that the radition is emitted isotrophically and neglect reflection. and [...]
Suppose that the electric field part of an electromagnetic wave in vacuum is E=(3.1N/C)cos[(1.8rad/m)y+(5.4×10 6 rad/s)t] i ^ (a) What is the direction of propagation? (b) What is the wavelength λ ? (c) What is the frequency v? (d) What is the amplitude of the magnetic field part of the wave? (e) Write an expression for the magnetic field part of the wave.
08
Sep
Suppose that the electric field part of an electromagnetic wave in vacuum is E=(3.1N/C)cos[(1.8rad/m)y+(5.4×10 6 rad/s)t] i ^ (a) What is the direction of propagation? (b) What is the wavelength λ ? (c) What is the frequency v? (d) What is the amplitude of the magnetic field part of the wave? (e) Write an expression [...]
A boat is sent across a river with a velocity of 8 kmh^−1. If the resultant velocity of the boat is 10 kmh^−1, the river is flowing with a velocity of
08
Sep
A boat is sent across a river with a velocity of 8 kmh^−1. If the resultant velocity of the boat is 10 kmh^−1, the river is flowing with a velocity of A boat is sent across a river with a velocity of 8 kmh^−1. If the resultant velocity of the boat is 10 kmh^−1 the [...]
A boat is moving with velocity 3i + 4j with respect to ground. The water in the river is moving with velocity – 3i – 4j with respect to ground. The relative velocity of the boat with respect to water is
08
Sep
A boat is moving with velocity 3i + 4j with respect to ground. The water in the river is moving with velocity – 3i – 4j with respect to ground. The relative velocity of the boat with respect to water is Rain is falling vertically downwards with velocity 4 m/s. A man is moving horizontal [...]