10th Class Physics MCQS
Mathematical formula of capacitance of a capacitor is:
C = V2/Q
C = V/Q
C = QV
C = Q/V
Electric potential is a quantity:
Scalar
All
Base
Vector
Two charged spheres are separated by 2 mm. Which of the following would produced the greatest attractive force?
+2 q and +2q
+2 q and -2q
+1 q and +4q
1 q and 4q
Coulomb’s law is mathematically stated as:
F = k q1 q2 / r2
F = k q1 q2 / r
F = k q1 q2/r3
F = k q2 q2 / r2
The S.I unit of electric potential is:
Coulomb
Watt
Volt
Joule
The intensity level of train siren is:
100 dB
120 dB
130 dB
150 dB
Mice can hear frequencies upto:
100, 000 Hz
120,000 Hz
25.000 Hz
1,000 Hz
The technique or method used to absorb undesirable sounds by soft and porous surface is called:
Acoustic protection
Ultrasonic
Echo
Infrasonics
The basic operations performed by a computer are:
Arithmetic operations
Non arithmetic operations
Both a and c
Logical operations
Level of noise recommended in eight, hour work day:
90 95 dB
85-90 dB
80 85 dB
80 90 dB
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