Question : An employer goes on employing more and more of a factor's unit until:

Option 1: the average revenue productivity becomes equal to the marginal revenue productivity

Option 2: the marginal revenue productivity becomes zero

Option 3: the diminishing marginal returns set into operation

Option 4: the marginal revenue productivity of a factor becomes equal to its reward

Question : If a change in all input leads to a proportionate change in output, it is a case of:

Option 1: constant returns to the scale

Option 2: diminishing returns to the scale

Option 3: increasing returns to the scale

Option 4: variable returns to the scale

Question : When a bar magnet is cut in two halves, the pole strength of each piece

Option 1: becomes double

Option 2: becomes half

Option 3: becomes zero

Option 4: remains the same

Question : Determine the total surface area of a hemisphere closed at the bottom. Radius of the hemisphere is $\sqrt{\frac{25}{\pi}}$ unit.

Option 1: 75 unit²

Option 2: 70 unit²

Option 3: 60 unit²

Option 4: 50 unit²

Question : Which of the following is the correct statement?

Option 1: Joule is the unit of work

Option 2: The unit of energy is the watt.

Option 3: Joule/ second is also a unit of energy.

Option 4: The unit of power is joule/newton.

Question : The average weight of three men, A, B and C is 84 kg. Another man, D, joins the group and the average now becomes 80 kg. If another man, E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. Then the weight of A is:

Option 1: 72 kg

Option 2: 74 kg

Option 3: 75 kg

Option 4: 76 kg