A quarter horse power motor runs at a speed of 600 rpm. Assuming 40% efficiency,the work done by the motor in one rotation will be a)7.46 J b)7400J c)74.6J d)7.46 erg

Q. A quarter horse power motor runs at a speed of 600 rpm. assuming 40% efficiency the work done by the motor in one rotation will be

Q. A 400 V dc series motor drives a load at rated voltage by drawing 20 A current running at the speed of 2000 rpm. The total series resistance is 1.4 $\Omega$. Assuming magnetic circuit to be linear, if load torque is increased by 49%. The speed of the motor in rpm will be _____

Q. An electric motor exerts a constant torque $5Nm$ on a flywheel by which it is rotated at the rate of $420rpm$. The power of motor is:

Q. A 600 V DC motor drives a 60 kW at 900 rpm. The shunt field resistance is 100 $\Omega$ and the armature resistance is 0.16$\Omega$. If the efficiency is 85% then the speed regulation of motor is _________%.

Q. The angular speed of a motor increases from $600$ rpm to $1200$ rpm in $10$s. What is the angular acceleration of the motor: