Question 488: AC fundamentals

Question

In an a.c. circuit the e.m.f. ($$\varepsilon $$) and the current 
(i)  at any instant are given respectively by 
$$\varepsilon $$ = E0sin$$\omega $$t,   $$i$$ = $$I$$0sin($$\omega $$t $$-$$ $$\phi $$)
The average power in the circuit over one cycle of a.c. is

Accepted Answer

Average power = $${{{E_0}{I_0}} \over 2}\cos \phi $$

Answer

$${{{E_0}{I_0}} \over 2}\cos \phi $$

Answer

$${{E_0}{I_0}}$$

Answer

$${{{E_0}{I_0}} \over 2}$$

Answer

$${{{E_0}{I_0}} \over 2}\sin \phi $$

AC fundamentals

In an a.c. circuit the e.m.f. ($\varepsilon ) and the current (i) at any instant are given respectively by \varepsilon = E0sin\omega t, i = I0sin(\omega t - \phi $) The average power in the circuit over one cycle of a.c. is

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