On which of the following variables heat convected depends ?
A). Power density
B). Thermal resistivity, density, specific heat
C). Thermal resistivity, density, specific heat
D). Gravitational constant
E). All of the above
2. Air-core coils are practically free from
3. The slewing speed of X-Y recorder is
4. What is the approximate path loss from satellite-to-earth station?
5. The Q of the crystal is of the order of ___________
6. In transistor amplifiers, we use ___________ transformer for impedance matching
7. Which of the following statements regarding reluctance-start motor is incorrect ?
8. In which of the following appUcations, direct current is absolutely essential ?
9. Which of the following motors is used in tape-recorders ?