MCQ
Armature current in dc motor will be maximum when
  • A
    Motor has acquired maximum speed
  • B
    Motor has acquired intermediate speed
  • Motor has just started moving
  • D
    Motor is switched off

Answer

Correct option: C.
Motor has just started moving
Motor has just started moving

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If the half life of a radioactive sample is $10\, hours$, its mean life is ..........$hours$
The area of each plate of a parallel plate capacitor is $100 \mathrm{~cm}^2$ and the distance between the plates is 1mm. It is filled with mica of dielectric 6. The radius of the equivalent capacity of the sphere will be
In alternating current circuits, the $a.c$. meters measure
In the given figure, a battery of emf $E$ is connnected across a conductor $P Q$ of length $'Y'$ and different area of cross-sections having radii $r_{1}$ and $r_{2}\left(r_{2}\,<\,r_{1}\right)$.

Choose the correct option as one moves from $P$ to $Q$ :

If the work function for a certain metal is $3.2\times 10^{-19}$  joule and it is illuminated with light of frequency $8\times 10^{14}$  Hz. The maximum kinetic energy of the photo-electrons would be ($\mathrm{h} = 6.63\times 10^{-34}\mathrm{Js})$
The $X-$ ray wavelength of ${L_\alpha }$ line of platinum $(Z=78)$ is $1.30\,{Å}.$ The $X -$ ray wavelength of ${L_\alpha }$ line of Molybdenum $(Z=42)$ is .............. $\mathop {\rm{A}}\limits^o $
Identify which of the following color light, when passed through a double-slit opening, will produce the widest central band of light on the screen?
Which one of them is a radioisotope?
Assertion : In the given circuit if lamp B or C fuses then light emitted by lamp A decreases.







Reason : Voltage on A decreases. 
A thin rod of $5cm$ length is kept along the axis of a concave mirror of $10cm$ focal length such that its image is real and magnified and one end touches the rod. Its magnification will be