Question No 1:
A flat iron is marked (Raise For Success) 120V, 600W. In normal use the current
in it is?
- 2A
- 4A
- 5A Correct
- 7.2A
The units of (Raise For Success) magnetic diplo moment are?
- Ampere
- Ampere-Meter
- Ampere-Meter 2 Correct
- Ampere / Meter
A step-down (Raise For Success) transformer is used to?
- Increase the power
- Decrease the power
- Increase the power
- Decrease the power Correct
Which of the (Raise For Success) following is greater wavelength?
- Gamma Rays
- Ultraviolet
- Infrared
- Radio Waves Correct
What is the name of the relationship between the peak
wavelength for (Raise For Success) a black body radiator and its temperature?
- Stefan Boltzmann Law
- Wiens Law Correct
- Snell’s Law
- Youngs Law
In the reversible (Raise For Success) process the system?
- It always close to equilibrium states Correct
- It close to equilibrium states only at the beginning and end
- Might never be close to any equilibrium state
- Is close to open equilibrium state throughout expect at the beginning and end
In construction a (Raise For Success) thermometer it is necessary to use a
substance that?
- Undergoes some change when heated or cooled Correct
- Expands linearly with rising temperatures
- Will not freeze
- Will not boil
When you stand (Raise For Success) in-front of a plane mirror your image is?
- Real erect and smaller than you
- Virtual erect and smaller than you
- Virtual erect and the same size as you Correct
- Real inverted and the same size as you
Interference (Raise For Success) of light is evidence that?
- The speed of light is very large
- Light is transverse wave
- Light is a wave phenomenon Correct
- Light is electromagnetic in character
A charged insulator (Raise For Success) can be discharged by passing in just
above a flame. This is because the flame:
- Warms it
- Dries it
- Contains carbon dioxide
- Contain ions Correct
What brought about (Raise For Success) the Quantum revolution?
Answer:
Quantum revolution is all about controlling individual
systems such as charged molecules to a great extent than before enabling (Raise For Success) even
more powerful applications of quantum information. The method borrows a quantum
logic approach from an experimental NIST atomic clock.
Explain why Equi-potential (Raise For Success) surface are always perpendicular
to electric field lines?
Answer:
The Equi-potential surface is any surface in which the
potential value is constant in any point on the surface. The electric field is (Raise For Success) always perpendicular to the surface because in the equipotential surface there
is no potential difference along any direction which is parallel to the
equipotential surface.
How does the source (Raise For Success) differ for a beam of gamma rays and a
beam of X-rays?
Answer:
The key difference gamma rays and x-rays is how they are
produced. Gamma rays originate from the settling process of an excited (Raise For Success) nucleus
of a radionuclide after it undergoes radioactive decay whereas x-rays are
produced when electrons strike a target or when electrons rearrange within an
atom.
On the basis of the repulsive nature of the force between
like charge and (Raise For Success) the freedom of motion of charge within a conductor, explain why
excess charge on an isolated conductor must reside on its surface?
Answer:
Inject some charge at arbitrary places within a conducting
object. (Raise For Success) Every bit of the charge repels every other bit so each bit runs away as
far as it can stopping only when it reaches the outer surface of the conductor.
Two identical clocks are synchronized one is then put in
orbit directed eastward (Raise For Success) around the world while the other remains on the earth.
Which clock turns slower? When the moving clock return to the earth. Are the
two still synchronized?
Answer:
The clock in orbit runs more slowly. The two clocks will not
be synchronized (Raise For Success) when the moving clock returns to earth. The clock in orbit
experiences a lower gravitational potential, Einstein’s theory of general
relativity predicts that it runs more slowly as a result.