emi

Related Questions

• The back e.m.f. induced in a coil, when current changes from $1 ampere$ to zero in one milli second, is 4 volts, the self inductance of the coil is

  ---

• A coil is wound as a transformer of rectangular cross-section. If all the linear dimensions of the transformer are increased by a factor 2 and the number of turns per unit length of the coil remain the same, the self inductance increased by a factor of

  ---

• In a step-up transformer the voltage in the primary is 220 V and the current is 5A. The secondary voltage is found to be 22000V. The current in the secondary (neglect losses) is

  ---

• When the current in a coil changes from 8 ampere to 2 ampere in $3 \times {10^{ - 2}}$second, the e.m.f. induced in the coil is $2\;volt$. The self inductance of the coil (in millihenry) is

  ---

• In a transformer the primary has 500 turns and secondary has 50 turns. 100 volts are applied to the primary coil, the voltage developed in the secondary will be

  ---