- The rotor of a stepper motor has
Under construction.
- The electric motor used in domestic mixers is
Under construction.
- A 3 -Φ induction motor has a starting torque of 100 % and a maximum torque of 200 % of full load torque. Find the slip at maximum torque?
T
_{st}= T_{f}and T_{max}= 2T_{f}. So T_{st}/ T_{max}= 2a / a^{2}+ 1 = ½

⇒ a^{2}- 4a + 1 = 0

⇒ a = 0.268 ( rejecting higher value).

Slip at maximum torque a = 0.268 = 26.8 %. - Linear induction motor is used in which purpose?
Under construction.
- In the network shown in the figure, if voltage V at the time considered is 20 V, then dV / dt at that time will be?
V = 20 V, Current through the 20 ohm resistor is 20 / 20 = 1 amp. Voltage across 10 ohm resistor = 40 - 20 = 20 V. So current through capacitor = 2 - 1 = 1 amp. Therefore C × dV / dt = ( 1 / 2 ) dV / dt = 1 amp, so dV / dt = 2 V / s.
- Neglecting all losses, the developed torque T of a d.c separately excited motor, operating under constant terminal voltage, is related to its output power P as
Under construction.
- A 4 pole generator with 16 coil has a two layer lap winding. The pole pitch is
Under construction.
- If the speed of a dc motor increases with load torque, then it is a
Under construction.
- Crawling in an IM is due to
Under construction.
- Emf induced in the rotor of 3 -Φ IM is proportional to the
Under construction.
- If two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively, then highest speed of the alternators is
Under construction.
- Type of fuel used and moderator in Magnox reactor in nuclear plant are
As coolant here we use CO
_{2}. - Slip in an IM can be measured by which of these methods?
Under construction.
- What are the methods we use to find voltage regulation of an alternator?
Under construction.
- Which of the prime mover is least efficient?
Under construction.
- One of the super thermal power station is located at
Under construction.
- Torque of an induction motor varies with voltage as
Under construction.
- The draught which a chimney produces is called
Under construction.
- _________ is a closed loop system
Under construction.
- The gain of an opamp is maximum at
Under construction.

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