Worksheets20EE262-BEEE Surprise Quiz - II
Total questions: 10
Worksheet time: 5mins
The direction of the magnetic field around a current-carrying conductor can be determined using ____.
Right-hand thumb rule
Fleming's left-hand rule
Ohm's law
Ampere's law
Magnetic flux density (B) is defined as ____.
flux per unit resistance
flux per unit area
flux per unit length
flux per unit current
Mutual inductance occurs when ____.
magnetic flux is constant
current flows in a single coil
two inductors share a magnetic field
two inductors are connected in series
The coefficient of coupling (k) for a perfect magnetically coupled coil is ____.
0
0.5
Infinite
1
The energy stored in an inductor is given by ____.
12LI2
LI
12CV2
12LI2R
The induced EMF in a coil is proportional to the _____.
resistance of the coil
magnetic flux linkage
current in the coil
rate of change of magnetic flux
In a step-up transformer, the number of turns in the secondary winding is ___.
equal to the primary
greater than the primary
less than the primary
connected electrically to the primary
In a transformer, eddy current losses can be reduced by ____.
increasing the load current
using a laminated core
decreasing the load resistance
increasing the primary turns
The purpose of oil in a transformer is to ____.
provide insulation and cooling
reduce eddy current losses
lubricate the windings
reduce noise
When the load on the secondary side of a transformer increases, then the _____.
secondary flux decreases
primary voltage increases
primary current increases
core losses decrease
