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Free tnpsc model questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. When a fluid passes through the constricted art of a pipe, its
(a)
Velocity increases and pressure decreases
(b)
Velocity decreases and pressure increases
(c)
Velocity and pressure increase
(d)
Velocity and pressure decrease
2. Erg × Sec is the unit of
(a)
Planck's constant
(b)
Angular momentum
(c)
Linear momentum
(d)
Energy
3. The SI unit of electric flux is
(a)
Joule per coulomb
(b)
Volt-meters
(c)
Newton per coulomb
(d)
Weber
4. Radio waves of constant amplitude can be generated with
(a)
Oscillator
(b)
FET
(c)
Rectifier
(d)
Filter
5. The core of a transformer is laminated to reduce
(a)
Hysteresis loss
(b)
Eddy current loss
(c)
Magnetic loss
(d)
Copper loss
6. One fermimetre is equal to
(a)
10
-9
m
(b)
10
-12
m
(c)
10
-15
m
(d)
10
-18
m
7. Rainbow is formed due to a combination of
(a)
Refraction and scattering
(b)
Dispersion and focusing
(c)
Dispersion and total internal reflection
(d)
Refraction and absorption
8. Which one of the following phenomena is used in optical fibres?
(a)
Total internal reflection
(b)
Refraction
(c)
Successive reflections
(d)
Scattering
9. In an isothermal change an ideal gas obeys
(a)
Charles law
(b)
Gay-Lussac’s law
(c)
Boyle’s law
(d)
None of the above
10. A galvanometer is converted into an ammeter when we connect a
(a)
Low resistance in parallel
(b)
Low resistance in series
(c)
High resistance in parallel
(d)
High resistance in series
