AIEEE 2003 | Alternating Current Question 168 | Physics

In an oscillating $$LC$$ circuit the maximum charge on the capacitor is $$Q$$. The charge on the capacitor when the energy is stored equally between the electric and magnetic field is

$${Q \over 2}$$

$${Q \over {\sqrt 3 }}$$

$${Q \over {\sqrt 2 }}$$

$$Q$$

AIEEE 2002

MCQ (Single Correct Answer)

-1

In a transformer, number of turns in the primary coil are $$140$$ and that in the secondary coil are $$280.$$ If current in primary coil is $$4A,$$ then that in the secondary coil is

$$4A$$

$$2A$$

$$6A$$

$$10A$$

AIEEE 2002

MCQ (Single Correct Answer)

-1

The power factor of $$AC$$ circuit having resistance $$(R)$$ and inductance $$(L)$$ connected in series and an angular velocity $$\omega $$ is

$$R/\omega L$$

$$R/{\left( {{R^2} + {\omega ^2}{L^2}} \right)^{1/2}}$$

$$\omega L/R$$

$$R/{\left( {{R^2} - {\omega ^2}{L^2}} \right)^{1/2}}$$