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Free tnpsc model questions Online Test - MeritNotes
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No. of Questions :10
Remaining Time :
1. For direct current, inductive reactance is
(a)
less than unity
(b)
infinity
(c)
unity
(d)
zero
2. The device which converts mechanical energy into electrical energy is
(a)
generator
(b)
motor
(c)
rectifier
(d)
transformer
3. Trains are
(a)
electric brake
(b)
electromagnetic brake
(c)
air brake
(d)
hydraulic brakes
4. In Fleming's right hand rule the finger showing the direction of induced current is
(a)
Forefinger
(b)
Last finger
(c)
Thumb
(d)
Middle finger
5. The unit of impedance is
(a)
Ampere
(b)
Coulomb
(c)
Ohm
(d)
Volt
6. When unit current flows through the coil, the coefficient of self induction numerically equal to
(a)
magnetic flux linked with the coil
(b)
rate of change of current through the coil
(c)
voltage lined with the coil
(d)
current linked with the coil
7. Induction motors are used in
(a)
fans
(b)
fridge
(c)
mixies
(d)
grinders
8. Air chokes are used for
(a)
Audio frequency
(b)
Microwave frequency
(c)
Video frequency
(d)
Radio frequency
9. In low power AC dynamoes magnetic field is provided by
(a)
electromagnets
(b)
permanent magnets
(c)
cylindrical magnets
(d)
horseshoe magnets
10. Which of the following cannot be stepped up in a transformer?
(a)
Input power
(b)
Input voltage
(c)
Input current
(d)
All
