Electrical Machines
An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound?

 2166.67V, 270 rpm.
 2166.67V, 230 rpm.
 541.67V, 250 rpm.
 541.67V, 200 rpm.

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Electrical Machines
In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed?

 The speed will increase in proportion to reduction in load.
 The speed will increase gradually.
 The speed will increase abruptly.
 The speed will remains almost constant.

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