1) The unit of vector is used to determine a) Direction b) Magnitude 2) A body can have zero velocity and still be accelerating a) True b) False c) We cannot say unless the mass of the body is known d) None of these 3) When two suspended objects are seen to attract each other electrically: a) They are both charged b) They must be charged c) Either (a) or (b) is charged d) Neither (a) nor (b) is true 4) Which series li in UV region? 5) Definition of temperature Constant? 6) Acceleration of body executing SHM is directed towards? 7) Voltage lags behind current in RC circuit? 8) Unit of acceleration is.? a) m.s^-1 b) m.s^-2 c) m.s^2 d) m.s^1 9) Dimension of angle? 10) If you push a box on the floor which force acts against your action? 11) Galvanometer becomes Ammeter when connected in? a) Series b) Parallel 12) The electric flux is ��.quantity? 13) Unit of permibility of free space? 14) S.I unit of acceleration? 15) What is the speed of sound in Vacuum? 16) Which of the following can be considered as ideal for being stationary? a) Earth b) Galaxy c) Space d) Nothing 17) Unit of impulse? 18) Definition of isothermal processes. 19) Definition of faraday�s law. 20) Definition of mass spectrometer. 21) In which circuit fraction of voltage is obtained as compared to voltage supplied a) Resistor b) Capacitor c) Inductor d) All 22) Rf value =? 23) Electric current cannot pass via�. 24) Simen is SI unit of? 25) Unit of weber is equal to? 26) Unit of angular momentum? 27) What is the radius of second orbital? a) 0 b) 15A-2 c) 2A-2 d) 3A 28) Which of the following represents electronegativity? 29) Newton is unit of a) Force b) Area c) momentum d) Acceleration 30) Alpha scattering experiment was conducted in which year? a) 1908 b) 1922 c) 1925 d) 1911 |
Inverse of a Function In this Post I will discuss the method for finding the inverse of a given function from the 4 options as given in the Entrance tests of Engineering Universities. The very first step before finding the inverse is to make a check whether the function is One-to-One or not. By One-to-One function we mean that function for example f(x) should not have the same value at two different values of x. In other words for each element of the Domain there should be a distinct element in the range. Check for One-to-One: A function which passes the horizontal line test is a One-to-One function. This means if a horizontal line is drawn it should not cross the function curve at more than one point. Another way to check if a function is One-to-One or not is shown below: If , f(a) = f(b) , implies that a=b , the given function is One-to-One. Consider the following examples: f(x) = 5x + 10 f(a) = 5a + 10 f(b) = 5b + 10 Taking f(a) = f(b) gives, 5a...
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