Question
For an experiment we have the following data set: n =
4, β X = a,β Y = 10,β XY = 21,β X2 = 30,β Y2Β = 30 the correlation coefficient is -0.8 then the value of a is:Solution
The correct answer is C
The moment of inertia of a thin rod of length L and mass M about an axis perpendicular to the rod and passing through a point at a distance L/4 from one...
The Lyman series in hydrogen atom spectrum lies in:
What is the speed of sound in air at room temperature (approx)?Β Β
A metallic conductor of circular cross-section has radius R. If current density varies as J = Jβ(1βr/R), the total current through the conductor is:...
The half-life of a radioactive substance is 5 hours. How much of the substance remains after 15 hours?Β Β Β Β
A coil with N turns and area A is placed in a magnetic field varying as B = BβΒ·eβΞ±t. What is the induced EMF at time t = 0?
The law of reflection states that the angle of incidence is equal to the angle of reflection. What is the angle of incidence when the angle of reflectio...
Which of the following pair regarding sound is correct?
I. Loudness β depends on amplitude
II. Shrillness β depends on frequency
The absolute temperature of a body A is five times that of another body B. For two bodies, the difference in wave lengths at which energy radiated is ma...
What is the SI unit of magnetic flux?
