MCQ
Power factor of an ideal choke coil (i.e., $R=0$ ) is
- ANear about zero
- ✓Zero
- CNear about one
- DOne
✓
Answer
Correct option: B.
Zero
b
(b)
(b)
$\cos \phi=\frac{R}{Z}=0$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The angle between the earth's magnetic and the earth's geographical axes is....$^o$
→Two lamps of luminous intensity of $8 Cd $ and $32 Cd$ respectively are lying at a distance of $1.2\, m$ from each other. Where should a screen be placed between two lamps such that its two faces are equally illuminated due to two sources
→Making a light wave vibrate in only one plane is known as:
Wavelength of an electron having energy $10\ keV$ is $......... A^0$:
→A double convex lens of glass of $\mu = 1.5$ has radius of curvature of each of its surface is $0.2 m.$ The power of the lens is
→A $5.0\, amp$ current is setup in an external circuit by a $6.0\, volt$ storage battery for $6.0$ minutes. The chemical energy of the battery is reduced by
→A carrot looks orange in colour because of the $\beta$ carotene molecule in it. This means that the $\beta$ carotene molecule absorbs light of wavelengths
→Three identical cells are connected in parallel across $A B$. Net emf across $A B$ is .......... $V$
→A coil of inductance $0.20\, H$ is connected in series with a switch and a cell of $emf$ $1.6\, V$. The total resistance of the circuit is $4.0\, \Omega $. What is the initial rate of growth of the current when the switch is closed ?.......$A\, s^{-1}$
→Two conductors have the same resistances at $0^{\circ} \mathrm{C}$ but their temperature coefficients of resistance are $\alpha_1$ and $\alpha_2$. The respective temperature coefficients for their series and parallel combinations are :
→