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.Management Sciences
Category: Physics Mcqs
To find the r.m.s value of an alternating current mathematically we need to have ________________?
0
A. Mean value of I2
B. Square root of mean value of I2
C. Square root of I2
D. Square of 1/2
In vibratory motion_________________?
A. P.E. remains constant
B. K.E. remain constant
C. total energy remains constant
D. total momentum remains constant
Taking off rocket can be explained by __________________?
A. 1st law of motion
B. 2nd law of motion
C. Law of conservation of momentum
D. law of conservation of energy
One pico stands for_________________?
A. 10 raised to power -15
B. 10 raised to power -12
C. 10 raised to power -9
D. 10 raised to power -6
The phase angle between the voltage and the current in an AC circuit consisting of a resistance is______________?
A. Zero
B. 45°
C. 90°
D. 180°
The mass attached to a spring executes ?
A. Vibratory motion
B. Rotatory motion
C. S.H.M
D. Both A and C
A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?
A. 2×108 Nm-2
B. 5×106 Nm-2
C. 0.5×10-6 Nm-2
D. 0.2×10-6Nm-2
For what displacement the P.E becomes 1/4 of its maximum value ?
A. x = x’
B. x = x’/2
C. x = x’/4
D. x = x(2)’/2
For a gas obeying Boyles law if the pressure is doubled the volume becomes________________?
A. double
B. one half
C. four times
D. one fourth
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