Table of Contents
- 1 What is the expression of power P?
- 2 Which of the following is correct expression for resistance for stretching a wire?
- 3 Which of the following is not an expression for power in a circuit?
- 4 What is power derive an expression for it?
- 5 When do you call a power an exponent?
- 6 Which is an example of an expression of power?
What is the expression of power P?
In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second….Power (physics)
| Power | |
|---|---|
| Common symbols | P |
| SI unit | watt (W) |
| In SI base units | kg⋅m2⋅s−3 |
| Derivations from other quantities | P = E/t P = F·v P = V·I P = τ·ω |
Which of the following is expression of power?
Explanation: Power is the energy per unit time. That is, P=E/t.
Which of the following is correct expression for resistance for stretching a wire?
The expression for the resistance of a wire is given as, R=ρlA where, ρ is the resistivity of a material. l is the length of wire.
What is the equation for electric power?
Electrical power is the product of voltage and current. P=VXI. P = V X I .
Which of the following is not an expression for power in a circuit?
Part (1^2/R) is the expression that does not represent electric power.
Which among the following is the correct expression of impedance?
Which, among the following is the correct expression for impedance? Explanation: We know that impedance is the reciprocal of admittance, hence the correct expression for impedance is: Z=1/Y.
What is power derive an expression for it?
We can define the electrical power in a circuit as the amount of energy produced or absorbed in a circuit. $\Rightarrow P = \dfrac{w}{t} $ (Where, $ P $ stands for the power, $ w $ stands for the work done and, $ t $ stands for the time.) Power is measured using the unit watt.
How do you use the power formula?
Excel POWER Function
- Summary. The Excel POWER function returns a number raised to a given power. The POWER function is an alternative to the exponent operator (^).
- Raise a number to a power.
- Number raised to power.
- =POWER (number, power)
- number – Number to raise to a power. power – Power to raise number to (the exponent).
When do you call a power an exponent?
An expression that represents repeated multiplication of the same factor is called a power. The number 5 is called the base, and the number 2 is called the exponent. The exponent corresponds to the number of times the base is used as a factor. If two powers have the same base then we can multiply the powers.
Which is the correct formula for power in physics?
Another Formula for Power. The expression for power is work/time. And since the expression for work is force*displacement, the expression for power can be rewritten as (force*displacement)/time. Since the expression for velocity is displacement/time, the expression for power can be rewritten once more as force*velocity.
Which is an example of an expression of power?
Power is often defined only in negative terms, and as a form of domination, but it can also be a positive force for individual and collective capacity to act for change. Lisa VeneKlasen and Valeries Miller in A New Weave of Power (2002, page 55) describe four ‘expressions of power’ as follows:
Which is the best definition of power to?
Power To. ‘Power to’ refers to the unique potential of every person to shape his or her life and world. When based on mutual support, it opens up the possibilities of joint action, or ‘power with’. Citizen education and leadership development for advocacy are based on the belief that each individual has the power to make a difference.