In cyclic process, work done is equal to the area of closed curve.
It is positive if the cycle is clockwise
and it is negative if the cycle is anticlockwise.
Why is a clockwise rotation considered negative?
The measure of an angle describes the magnitude and direction of the rotation of the ray from its initial position to its terminal position. If the rotation is counterclockwise, the angle has a positive measure. If the
rotation is clockwise, the angle has a negative measure
.
Is a negative current clockwise?
Recall that the convention for the direction of current is from the positive end of the voltage source to the negative end (opposite the direction of flow of electrons). Thus, in this circuit the current is flowing
counterclockwise from
the voltage source.
Why is work done in a cyclic process positive?
In Figure 21.16c the net work done by the system is positive
because the pressure during expansion is greater than the pressure during compression
. Note that the cyclic process in Figure 21.16c generates a clockwise path on the P – V diagram.
What is the work done in cyclic process?
The process in which the initial and final state is the same is known as a cyclic process. It is a sequence of processes that leave the system in the same state in which it started. Hence, the work done by the system in a cyclic transformation is
equal to the heat absorbed by the system
.
Is clockwise left or right?
Clockwise and anticlockwise are ways of indicating the direction of a turn.
Clockwise involves a turn to the right
, following the direction of the hands of a clock. It is a negative rotation direction.
How do you tell if current is clockwise or counterclockwise?
In the given diagram, what is the direction of the magnetic field at a point ? Explanation:
Current flows counterclockwise in
this circuit. Using the right hand rule for the conventional current in the wire, the right thumb is pointed along the wire pointing to the left at the top of the circuit.
Which processes are reversible?
- extension of springs.
- slow adiabatic compression or expansion of gases.
- electrolysis (with no resistance in the electrolyte)
- the frictionless motion of solids.
- slow isothermal compression or expansion of gases.
In which thermodynamic process work done is negative?
Work done in an isothermal process
Can work done in cyclic process is zero?
Yes
, work done in a cyclic process can be zero. When the processes reverse exactly under similar conditions retracting the samw P-V diagram.
In which process work done is zero?
An isochoric process
What is an example of a cyclic process?
In a cyclic process, the system starts and returns to the same thermodynamic state. … A cyclic process is the underlying principle for an engine. If the cycle goes counterclockwise, work is done on the system every cycle. An example of such a system is
a refrigerator or air conditioner
.
What is the efficiency of a cyclic process?
A system undergoes a cyclic process in which it absorbs Q1 heat and gives out Q2 heat. The efficiency of the process is
η
and the work done is W.
What way is clockwise?
Clockwise and anticlockwise are ways of indicating the direction of a turn. Clockwise
involves a turn to the right
, following the direction of the hands of a clock. It is a negative rotation direction.
What is the meaning of clockwise direction?
:
in the direction in which the hands of a clock rotate as viewed from in front or as if standing on a clock face
.
Is counterclockwise tight or loose?
The easiest way to remember which direction tightens and which one loosens is the old axiom “righty-tighty and lefty-loosey.” This means that turning most threaded things right, or clockwise, tightens them (righty-tighty) and turning them to the left, or counterclockwise,
loosens them (lefty-loosey)
.
