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Free gk questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. In a capacitive circuit, power over a complete cycle is
(a)
zero
(b)
unity
(c)
less than unity
(d)
greater than unity
2. The emf induced whenever there is a change in the magnetic flux linked with closed circuit is known as
(a)
mutually induced emf
(b)
thermo emf
(c)
static emf
(d)
induced emf
3. The emf induced by changing the orientation of coil is _____ in nature.
(a)
exponential
(b)
cosine
(c)
sinusoidal
(d)
none of these
4. The unit of capacitive reactance is
(a)
ampere
(b)
coulomb
(c)
ohm
(d)
volt
5. Chokes used in low frequency A.C. circuits are known as
(a)
audio frequency chokes
(b)
ultra high frequency chokes
(c)
radio frequency chokes
(d)
none of the above
6. The energy lost in the form of heat due to varying magnetic flux in the core is called
(a)
flux loss
(b)
copper loss
(c)
hysteresis loss
(d)
eddy current loss
7. The law that gives the direction of the induced current produced in a circuit is
(a)
Fleming’s left hand rule
(b)
Tangent law
(c)
Faraday's law
(d)
Lenz's law
8. The current that flows in a closed circuit due to the changes in the magnetic flux associated with it is known as
(a)
thermoelectric current
(b)
induced current
(c)
static current
(d)
mutually induced current
9. Eddy current loss can be minimised by
(a)
using laminated core made of stelloy
(b)
using shell type of core
(c)
using laminated core made of mumetal
(d)
using wires of low resistance
10. Energy lost due to the current flowing through the primary and secondary windings is called
(a)
flux loss
(b)
copper loss
(c)
eddy current loss
(d)
hysteresis loss
