The air resistance to the movement of the train is proportional to
A). speed
B). (speed)2
C). (speed)3
D). 1/speed
1. The initial permeability of an iron rod is
2. The term 'cogging' is associated with
3. The forward voltage drop across a silicon diode is about ___________
4. The speed of a D.C. shunt motor can be increased by
5. Which of the following AC. motors is usually used in large motor-generator sets?
6. A field of force can exist only between
7. When a step-input is given to an OP-amp integrator, the output will be
8. In force current analogue, mechanical mobility is analogous to
9. The efficiency of two identical transformers under load conditions can be determined by
10. The interaction between a transmission line and communication line is minimized by