The insulating material for a cable should have
A). Low cost
B). High mechanical strength
C). High mechanical strength
D). All of the above
3. At the instant of starting when a D.C. motor is put on supply, it behaves like
4. Which of the following is the demerit of a 'constant voltage transmission system' ?
5. An uncharged conductor is placed near a charged conductor, then
6. Under ordinary circumstances, impulse noise can be reduced in
7. Which of the following essential features is possessed by an indicating instrument ?
8. __________ method of starting a three phase induction motor needs six terminals.
9. Which D.C. motor is generally preferred for cranes and hoists?
10. Which of the following motors is usually preferred for kiln drives?