A 1000 Kg car travelling with a speed of 90 km/hr turns around a curve of radius 0.1 km. The necessary centripetal force comes out to be:
Question # 2
To hear a clear echo, the reflecting surface must be at a minimum distance of
Question # 3
The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:
Question # 4
The second law gives the relationship between
Question # 5
At higher frequency of the alternating current, the capacitive reactance Xc
Question # 6
Amplitude is the displacement of the vibrating body from:
Question # 7
Which one of the following is an example of resonance
Question # 8
If the length of the conductor is double and its cross sectional area is halved, its conductance will
Question # 9
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 10
The magnitude of alternative voltage V:
Question # 11
Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of
Question # 12
Silicon can be obtained from:
Question # 13
When you drop a ball it acceleerates at 9.8 m/sex. If you instead throw it downward then it accelerates immediately after leaving your hand assuming no air resistance.
Question # 14
When a charged particle passes through matter, it produces ionization, this effect is used in
Question # 15
A shunt resistance parallel to the galvanometer is used to convert it into
Question # 16
When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
Question # 17
The dimensions of work
Question # 18
A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is
Question # 19
The blood pressure of a person
Question # 20
The efficiency of petrol engine is usually not more than 25% to 30% because of
Question # 21
To make an LED, it is impreacticable to use:
Question # 22
From sand, we get a material used for construction of computer chips. That material is called:
Question # 23
The velocity of falling raindrops attains limited value because of
Question # 24
To see the minor details of the object by microscope, it should have:
Question # 25
The direction of the streamlines is the same as the direction of the
Question # 26
A boat of mass 40 kg is at rest, A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. What is the velocity of boat?
Question # 27
A line which represents the direction of travel of a wave is known as
Question # 28
If force and displacement are in opposite direction, the work done is taken as:
Question # 29
Root out the conventional source of energy:
Question # 30
Frequency of red color as compared to that of violet color is:
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