| 1 |
The rear wheels of an automobile are rotating with an angular velocity of 14 rev/sec which is reduced to 38 rad/sec in 5 second when brakes are applied. Its angular acceleration is:
|
A. 5 rad/sec2
B. -10 rev/sec2
C. -10 rad/sec2
D. -5 rev/sec2
|
| 2 |
According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be
|
A. low
B. zero
C. high
D. all of them
|
| 3 |
Significant figures in 0.0010 are:
|
A. Four
B. Three
C. Two
D. One
|
| 4 |
Terminal velocity is the maximum velocity attained by a spherical droplet when the drag force______the weight of droplet:
|
A. Is smaller than
B. Is greater than
C. Becomes equal to
D. None of these
|
| 5 |
The weight 'mg' of the bob is resolved into
|
A. one component
B. two components
C. three components
D. four components
|
| 6 |
NmA-1 is commonly called:
|
A. Weber
B. Apmere
C. Guass
D. Coulomb
|
| 7 |
When a body is performing S.H.M., its acceleration is
|
A. inversely proportional to the displacement
B. directly proportional to the applied force
C. directly proportional to the amplitude
D. directly proportional to the displacement but in opposite direction
|
| 8 |
The velocity of falling raindrop attains limited value because of
|
A. Up trust of air
B. Viscous force exerted by air
C. Surface tension effect
D. Air currents atmosphere
|
| 9 |
Which of the following is not mechanical wave?
|
A. Sound wave
B. Light wave
C. wave produced in spring
D. None of them
|
| 10 |
The damping depends upon the
|
A. amplitude
B. sharpness
C. both of them
D. none of them
|
| 11 |
The direction of a vector in space requires:
|
A. X-axis
B. X and Y-axes
C. XYZ axes
D. Y and Z-axes
|
| 12 |
If the mass of the simple pendulum becomes double, its time period
|
A. increase
B. decreases
C. remains constant
D. none of them
|
| 13 |
The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at
|
A. 100 K
B. 273 K
C. 0 K
D. -273 K
|
| 14 |
When two spherical
conducting balls at different potentials are joined by a metallic wire, after
some time:
|
A. Both the conductors are
at the same potential
B. Potential difference
across the conductors remain constant
C. Potential difference
across the conductors becomes zero
|
| 15 |
If a body reaches a speed equal to the speed of light, then its mass will became
|
A. zero
B. very small
C. infinity
D. none of these
|
| 16 |
The domains are of macroscopic size of the order of
|
A. centimeters
B. meters
C. millimeters
D. nanomneters
|
| 17 |
The law of conservation of energy gives us
|
A. equation of continuity
B. Bernoulli's theorem
C. both of them
D. none of them
|
| 18 |
Which of the following options states the names of fluids in the order of increasing viscosity?
|
A. mercury, motor oil, methanol
B. methanol, mercury, motor oil
C. motor oil, mercury, methanol
D. methanol, motor oil, mercury
|
| 19 |
Selenium is:
|
A. An insulator
B. A conductor
C. Both A and B
D. Excellent conductor
|
| 20 |
Rate of decay is actually described by.
|
A. Half line
B. Decay constant
C. Mean life
D. Total life
|
| 21 |
In SHM, there is always a constant ratio between displacement if body and its:
|
A. Velocity
B. Period
C. Mass
D. Acceleration
|
| 22 |
Work is a Quantity
|
A. Vector
B. Scalar
C. Non-physical
D. None of these
|
| 23 |
Electrons of an isolated atom are bound to the nucleus, and
|
A. can only have distinct energy level
B. can only have same energy level
C. may or may not have distinct energy levels
D. none of these
|
| 24 |
The SI unit of flux density is.
|
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
|
| 25 |
The capacity of a parallel plat capacitor depends on the
|
A. Type to metal used
B. Thickness of plates
C. Potential applied across the plates
D. Separation between the plates
|
| 26 |
When a high energy photon interact with a metal, which of the following effect is most likely to be taken place
|
A. pair production
B. photoelectric effect
C. Compton effect
D. None of these
|
| 27 |
The number of vibrating body at any instant from its equilibrium position is called
|
A. displacement
B. frequency
C. amplitude
D. time period
|
| 28 |
The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
|
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
|
| 29 |
Different radioactive material have
|
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
|
| 30 |
A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is
|
A. 5N
B. 4N
C. 1.5N
D. 6N
|