Energy stored by a coil is doubled when its current is increased by percent___________?

Related Mcqs:

Conductivity is analogous to____________?

A. retentivity B. resistivity C. permeability D. inductance...

Hard steel is suitable for making permanent magnets because_____________?

A. it has good residual magnetism B. its hysteresis loop has large area C. its mechanical strength is high D. its mechanical strength is low...

Those magnetic materials are best suited for making armature and transformer cores which have ________ permeability and ________ hystersis loss

A. high, high B. low, high C. high, low D. low, low...

Hysteresis loss least depends on____________?

A. volume of material B. frequency C. steinmetz coefficient of material D. ambient temperature...

Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it___________?

A. lowers their power efficiency B. increases their cost of manufacture C. leads to their increased weight D. produces fringing...