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What is meant by magnetic coupling coefficient?
Concept: undefined >> undefined
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What are the Uses of rejector circuit?
Concept: undefined >> undefined
What is binding energy of a hydrogen atom?
Concept: undefined >> undefined
The current in a coil changes from 50A to 10A in 0.1 second. The self inductance of the coil is 20H. The induced e.m.f. in the coil is ______.
Concept: undefined >> undefined
The energy of the free surface of a liquid drop is 5π times the surface tension of the liquid. Find the diameter of the drop in C.G.S. system.
Concept: undefined >> undefined
Derive Laplace’s law for spherical membrane of bubble due to surface tension.
Concept: undefined >> undefined
Which logic gate corresponds to the truth table given below?
|
A |
B |
Y |
|
0 |
0 |
I |
|
0 |
1 |
0 |
|
1 |
0 |
0 |
|
1 |
1 |
0 |
Concept: undefined >> undefined
State Wein's displacement law
Concept: undefined >> undefined
The surface tension of water at 0°C is 75.5 dyne/cm. Calculate surface tension of water at 25°C.
(α for water = 2.7×10-3/°C)
Concept: undefined >> undefined
Derive an expression for excess pressure inside a drop of liquid.
Concept: undefined >> undefined
Angle of contact for the pair of pure water with clean glass is _______.
Concept: undefined >> undefined
A raindrop of diameter 4 mm is about to fall on the ground. Calculate the pressure inside the raindrop. [Surface tension of water T = 0.072 N/m, atmospheric pressure = 1.013 x 105 N/m2 ]
Concept: undefined >> undefined
Draw a neat labelled diagram showing forces acting on the meniscus of water in a capillary tube.
Concept: undefined >> undefined
The output of NOR gate is high, when _______.
Concept: undefined >> undefined
Define the angle of contact.
Concept: undefined >> undefined
Water rises to a height 3.2 cm in a glass capillary tube. Find the height to which the same water will rise in another glass capillary having half area of cross section.
Concept: undefined >> undefined
In which of the following substances, surface tension increases with increase in temperature ?
- Copper
- Molten copper
- Iron
- Molten iron
Concept: undefined >> undefined
An A.C. circuit consists of inductor of inductance 125 mH connected in parallel with a capacitor of capacity 50 μF. Determine the resonant frequency.
Concept: undefined >> undefined
'n' droplets of equal size of radius r coalesce to form a bigger drop of radius R. The energy liberated is equal to...................
(T =Surface tension of water)
`(a) 4piR^2T[n^(1/3)-1]`
`(b) 4pir^2T[n^(1/3)-1]`
`(c) 4piR^2T[n^(2/3)-1]`
`(d)4 pir^2T[n^(2/3)-1]`
Concept: undefined >> undefined
