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S

Santosh 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What do you mean by Infrasonic?

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Deepika replied | 04 May

Relating to or denoting sound waves with a frequency below the lower limit of human audibility.

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S

Shishir 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

How radiocarbon is produced in the atmosphere?

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Deepika replied | 04 May

Most of the radiocarbon found on earth is formed naturally in the upper atmosphere. High-energy cosmic rays (from outside the solar system) are constantly bombarding the upper atmosphere. These high-energy particles undergo a whole cascade of nuclear reactions resulting in some slow moving neutrons.

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A

Aishwarya 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Why it is easier to roll a stone up a sloping road than to lift it vertical upwards?

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Deepika replied | 04 May

Work done in rolling a stone is less than in lifting it.

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S

Sai 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the SI unit of Nuclear sizes?

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Deepika replied | 04 May

Fermi.

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T

Taranum 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is intensity of light?

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J

Jagmohan replied | 19/11/2016

If light is represented as e=E sin(wt), than Intensity I=E^2.

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A

Atim 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Name the three types of Newton’s motions?

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Deepika replied | 04 May

1. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.This law is often called "the law of inertia".
2. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater...  more»
1. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.This law is often called "the law of inertia".
2. Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
3. For every action there is an equal and opposite re-action. «less

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R

Ravi 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the difference between amplitude and frequency?

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Deepika replied | 04 May

The difference between frequency and amplitude is that:
frequency is a measurement of cycles per second, and amplitude is a measurement of how large a wave is. Amplitude represents the wave's energy.

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N

Nazia 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

How amplitude and frequency are correlated?

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Deepika replied | 04 May

For any wave, the amplitude can be anything. There is a simple relationship between wavelength, frequency, and velocity. You can see this easily: a wave travels one wavelength L in one period P, so v = L/P. The period P is defined as the inverse of the frequency f, so P = 1/f.

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A

Ajay 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the SI unit of intensity of illumination?

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Deepika replied | 04 May

The lux (symbol: lx) is the SI unit of illuminate and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square meter. In photometry, this is used as a measure of the intensity, as perceived by the human eye, of light that hits or passes through a surface.

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R

Raje 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the use of RADAR?

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Deepika replied | 04 May

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

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M

Malvika 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the use of SONAR?

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Deepika replied | 04 May

Sonar (originally an acronym for Sound Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

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A

Abdul 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the sound called which has the frequency below 20Hz?

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D

Deepika replied | 04 May

Infrasonic.

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P

Preeti 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Why it takes much longer to cook food in hill stations then in the plains?

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Jagmohan replied | 19/11/2016

PV=RT=constant
As you know in pressure cooker food cooks faster due to high pressure created in cooker. At height or hill station pressure is less than pressure in plain due to less pressure, T decreases and therefore it takes more time to cook food in height.

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G

Geeta 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the use of optical fibre?

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Jagmohan replied | 19/11/2016

As you know we use electrical cables to carry electrical signals while optical fiber carry optical signals. Previously cables were mostly used for these transmissions. Now a days we are using fiber because it is more economical its cost to carry the same no. of signals is less than cable. For this we convert electrical signal to optical signal by LED (light emitting diode) transmit over Fiber.

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S

Shreyansh 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is supersonic plane?

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J

Jagmohan replied | 19/11/2016

Means for which speed is greater than speed of sound.

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S

Saddam 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

On what principle AC generator is work?

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Jagmohan replied | 19/11/2016

AC generation is nothing but conversion of one type of energy into electrical energy.
Like in hydro power system first potential energy of water is converted into mechanical energy than this mechanical energy is converted into electrical energy.

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V

Vishal 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Give an example of a material each for which temperature coefficient of resistivity is positive and negative?

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S

Shagufta 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Name the network within an institution, made by connecting all or some of their computers?

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P

Praneeth 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

A monochromatic light source of power 5mW emits 8 * 10 power 15 photons per second. This light ejects photoelectrons from a metal surface. The stopping potential for this set up is 2V. Calculate the work function of the metal?

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P

Praveen 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Define potential difference?

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D

Dhanya 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the difference between photon theory and wave theory?

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A

Anish 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

Define LAN?

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B

Baby 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is magnetic compass?

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U

User 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What do you mean by Gravitational force?

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K

K. 14/10/2016 in  Class XI-XII Tuition (PUC), Physics(Class XI-XII Tuition (PUC))

What is the constant value of gravitation?

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