The demand for a large increase in torque of a d.c. shunt motor is met by
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If a DC series motor is made to run on AC supply. It will
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The direction of rotation of a DC shunt motor can be reversed by interchanging
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The deciding factor in the selection of a d.c. motor for a particular application is its ……………..characteristic
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The Brushes on DC machine are always placed on—————, in order to achieve sparkles commutation?
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A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is
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For an application that requires smooth and precise speed control over the wide range, the motor is preferred is
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The most commonly used method of speed control of a D.C motor is by varying the
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A separately excited 300 V DC shunt motor under no-load runs at 900 rpm drawing an armature current of 2 A
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A cumulative compound long shunt motor is driving a load at rated torque and rated speed
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The compensating winding in the DC machine is
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A dc series motor has an armature resistance of 0.06 Ω and series field resistance of 0.08 Ω. The motor is connected to a 400 V supply
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