| 1 |
Such oscillations in which the amplitude decreases steadily with time, are called
|
A. resonance
B. force oscillations
C. large oscillations
D. damped oscillations
|
| 2 |
The permeability of free space is measured in:
|
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
|
| 3 |
The vector representation of force experience give the direction of
|
A. magnetic field
B. current
C. length of conductor
D. force
|
| 4 |
The mass 'm' of a body moving at 0.8 c (whose rest mass is mo) becomes
|
A. 2 mo
B. 1.67 mo
C. 0.67 mo
D. 2.67 mo
|
| 5 |
The impedance of RLC series resonance circuit at resonant frequency is
|
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
|
| 6 |
Angular momentum
|
A. Scalar
B. Axial vector
C. Polar vector
D. At 45° angle
|
| 7 |
A spring of constant k = 0.4 N m-1is to be extended thorugh 10 cm at a place where g = 10 m sec-2. The mass to be suspended should be:
|
A. 4 gms
B. 0.4 gms
C. 40 gms
D. None of these
|
| 8 |
The analysis of fluid motion becomes simplified by using
|
A. law of conservation
B. law of conservation of energy
C. both of them
D. none of them
|
| 9 |
The results of mechanical tests are usually expressed in terms of
|
A. stress
B. strain
C. stress and strain
D. neither strees nor strain
|
| 10 |
The entity which measures the quantity of motion in a body is called
|
A. force
B. energy
C. momentum
D. power
|
| 11 |
Which is modified form of galvanometer
|
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
|
| 12 |
Monochromatic light means waves of:
|
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
|
| 13 |
Nucleus consists of
|
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
|
| 14 |
A pair of quark and antiquark makes a:
|
A. Meson
B. Baryon
C. Proton
D. Neutron
|
| 15 |
Which of the following friction is self-adjusting force.
|
A. Static
B. Dynamic
C. Limiting
D. Sliding
|
| 16 |
Two forces of 10N and 8N are applied simultaneously to a body. The maximum value of their resultant is:
|
A. 20 N
B. -2 N
C. 18 N
D. 36 N
|
| 17 |
Acceleration produced in a body by the force varies
|
A. inversely as the applied force
B. directly as the applied force
C. directly as the mass of the body
D. none of them
|
| 18 |
Blood pressure is measured by the instrument
|
A. stethoscope
B. sphygmomanometer
C. barometer
D. none of them
|
| 19 |
Alternating current can not be measured by D.C. ammeter because
|
A. A.C. can not pass through D.C. Ammeter
B. A.C. changes direction
C. Average value of current for complete cycle is zero
D. D.C. Ammeter will get damaged
|
| 20 |
The electric lines of force are
|
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
|
| 21 |
When a falling body hits ground, its KE changes to _____ energy.
|
A. Potential
B. Chemical
C. Mechanical
D. sound and heat
|
| 22 |
The crystalline structure of NaCI is
|
A. rectangular
B. hexagonal
C. tetrahedral
D. cubical
|
| 23 |
Drag force increases if speed of the object moving through the fluid:
|
A. Increases
B. Decreases
C. Remains constant
D. None of these
|
| 24 |
For a moving body, at any instant of time
|
A. If the body is not moving the acceleration is necessarily zero
B. If the body is slowing, the retardation is negative
C. If the body is slowing, the distance is negative
D. If displacement, velocity and acceleration at that instant are known, we can find the displacement at any given time in future
|
| 25 |
A potential barrier of 0.7 V exists across p-n junction made from:
|
A. Germanium
B. Silicon
C. Arsenic
D. Gallium
|
| 26 |
Heat travels through vacuum by
|
A. Conduction
B. Convection
C. Radiation
D. Both A and B
|
| 27 |
Capacitance of two or more capacitors
|
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
|
| 28 |
The second law of thermodynamics is concerned with the circumstances in which
|
A. heat can be converted into work
B. direction of flow of heat
C. none of them
D. both of them
|
| 29 |
If the mass of the simple pendulum becomes double, its time period
|
A. increase
B. decreases
C. remains constant
D. none of them
|
| 30 |
The circuit in which current and voltage are in phase, the power factor is
|
A. zero
B. 1
C. negative
D. 0.83
|