| 1 |
The dimensions of stress are
|
A. [MLT-1]
B. [ML-1 T]
C. [ML-1T-1]
D. [ML-1T-2]
|
| 2 |
Woolen clothing a effective in keeping us warm because.
|
A. An trapped int he wool acts as an insulator
B. Heat loss by convection and radiation is prevented
C. Wool is bad traciator and good absorber of heat
D. Wool can retain high temperatures
|
| 3 |
A diatomic gas contains only
|
A. Translational K.E.
B. Rotational K.E.
C. Vibrational K.E.
D. All of these
|
| 4 |
The SI unit of mutual induction a
|
A. Vs-1 A-1
B. V m -1 A-1
C. Henry
D. Tesla
|
| 5 |
Which incapability of the materials is represented by the phenomenon of hysteresis.
|
A. Magnetic saturation
B. Low susceptibility
C. Retrace the path
D. Orientation
|
| 6 |
The change in entropy for any reversible cycle is identically
|
A. Infinite
B. Positive
C. Negative
D. Zero
|
| 7 |
Which law states that a change in the internal energy of a closed thermodynamic system is equal to the difference between the heat supplied to the system and teh amount of work by the system on the surrounding.
|
A. Zeroth law of thermodynamics
B. First law of thermodynamics
C. Second law of thermodynamics
D. Third law of thermodynamics
|
| 8 |
The loss of mass in a.m.u in a nuclear change can be calculated from energy involved in MeV by
|
A. Dividing by 931
B. Multiplying by 931
C. Diving by 391
D. Multiplying by 391
|
| 9 |
Which of the following is a properly of a uniform gravitational field.
|
A. If acts equally in all directions.
B. Its field strength is the same at all points with in it
C. the gravitational potential has the same value of all points with in it
D. It produces zero force on a stationary test mass placed in it.
|
| 10 |
The process of combining low frequency signals with high frequency radio waves is called.
|
A. Modulation
B. Resonance
C. Fluctuation
D. Amplitude
|
| 11 |
The air pressure at the bottom of an air foiling motion is
|
A. Greater than that on the top
B. Equal to that on the top
C. Grather than that on the top
D. Zero
|
| 12 |
The circumference of earth was measured by
|
A. Alberuni
B. Alkundi
C. Ibn al haithem
D. Issac Newton
|
| 13 |
A transformer is used to.
|
A. Convert D.C. into A.C.
B. Convert A.C. in to D.C.
C. Obtain A.C. voltage
D. Enhance the power
|
| 14 |
Which electrical component uses a low current circuit to switch a high current ON or OFF.
|
A. Capacitor
B. Diode
C. Reed rely
D. Thermistor
|
| 15 |
A mercury thermometer has
|
A. Low conductivity and low thermal capacity
B. High conductivity and high thermal capacity
C. Low conductivity and high thermal capacity
D. High conductivity and high thermal capacity
|
| 16 |
Who studied the change in velocity with the help of geometry for the first time.
|
A. Nicole Oresme
B. Galileo
C. Alberuni
D. Ibn al haithem
|
| 17 |
By placing soft iron inside a coil
|
A. Increases the magnetic flux
B. Decreases the magnetic flux
C. Creates no change in magnetic flux
D. Decreases the diameter of the core
|
| 18 |
Who introduced the concept that an atom posses quantized energy levels.
|
A. Raman
B. Bohr
C. Newton
D. Fermi
|
| 19 |
The gravitational potential inside a hollow spherical shell
|
A. Increases from zero at the centre to the maximum value at the surface
B. Is zero throughout the inteior
C. Decreases from the centre
D. Is uniform throughout the interior
|
| 20 |
Which quantity has different units from the other three.
|
A. Density x volume x velocity
B. Rate of change of momentum
C. Young's modulus x area
D. Weight
|
| 21 |
How many calories of heat are required to evaporate completely 1 g or ice at 0 oC
|
A. 120 calories
B. 520 calories
C. 720 calories
D. 920 calories
|
| 22 |
A junction between P-Type and n-type materials is called.
|
A. Ampilifier
B. Transistor
C. Rectifier
D. Diode
|
| 23 |
A man in an elevator ascending with an acceleration will feel that his weight.
|
A. Has increased
B. Has decreased
C. Remains the same
D. Vanishes
|
| 24 |
Which of the following should not change in isothermal operation.
|
A. Heat constant
B. Volume
C. Pressure
D. Temperature
|
| 25 |
The most familiar example of radioactive dating is.
|
A. Nitrogen dating
B. Carbon dating
C. Hydrogen dating
D. Helium dating
|
| 26 |
A steel of which material should be placed between the plates of a parallel plate capacitor in order to increase its capacitance.
|
A. tin
B. Iron
C. Copper
D. Mica
|
| 27 |
Geiger counter was designed by
|
A. Wilson
B. Geiger and Muller
C. Lawrence
D. Mosely
|
| 28 |
The internal energy of an isolated system
|
A. Is zero
B. Keeps on changing
C. Remains constant
D. Cannot be judged
|
| 29 |
Which of the following is a set of supplementary units.
|
A. Radian and steradian
B. Radian and mole
C. Steradian and candela
D. Radian and kelvin
|
| 30 |
A force of 50 N acts on a body for 10 s the change in momentum will be.
|
A. 5 N s
B. 200 Ns
C. 500 Ns
D. 800 N s
|