Worksheets24-25_20EE262_SQ1
Total questions: 10
Worksheet time: 5mins
The relationship between magnetomotive force (MMF), magnetic flux (Φ), and reluctance (R) in a magnetic circuit is described by __________
Ampere’s law
Ohm’s law
Faraday’s law
Biot-Savart law
Magnetic field intensity is given by _____
I/Nl
N/Il
l/NI
NI/l
The reciprocal of resistance is __________
reluctance
conductance
permeance
inductance
The unit of Magnetomotive force is ___________
Weber
Weber/m
Ampere-turns
Tesla
The iron loss of transformers depends on ________.
current
voltage
power
energy
The function of conservator in an electrical transformer is to __________
supply cooling oil to transformer in time of need
provide fresh air for cooling the transformer
protect the transformer from damage when oil expends due to heating
d) protect from dirt
The load current affects ________ loss in transformers.
core loss
variable loss
hysteresis loss
eddy current loss
A step-down transformer has 600 turns on the primary winding and 300 turns on the secondary winding. If the primary voltage is 240V, what is the secondary voltage?
120V
240V
480V
960V
The primary and secondary winding of a transformer are usually wound on the same core to ________
reduce the size of the transformer
increase the voltage of the primary winding
decrease the voltage of the secondary winding
ensure efficient energy transfer between the windings
The working principle of transformer is based on __________
self-induction
mutual induction
Ampere law
Coulomb law
