Physics Past Questions and Answers

The equation P^xV^yT^z = Constant is Charles’ law if

A X = 0, y = 1 and z = -1
B X = 0, y = -1 and z = 1
C X = 1, y = 1 and z = 0
D X = 1, y = 1 and z = -1
E X = 1, y = 1 and z = 1

Question 307:

When a resistor of resistance R is connected across a.c. the terminal p.d. of the cell is reduced to three-quart its e.m.f. The cell’s internal resistance in terms of R is ____________

A \(\frac{R}{4}\)
B \(\frac{R}{3}\)
C \(\frac{R}{2}\)
D 2\(\frac{R}{3}\)
E R

Question 308:

Which of the following cells does not require a dipolar for effective and efficient delivery of current?

A Daniel cell
B Dry Leclanche cell
C Nickel-iron accumulator
D Voltaic cell
E Wet Leclanche cell

Question 309:

Which of the following statements about water is NOT correct?

A Pure water freezes at 0°C under normal pressure
B The volume of a given mass of water at 0° is less than its volume at 4°C
C Water boils at a definite temperature
D Water evaporates at all temperatures
E Water has its maximum density at 4°C

Question 310:

A body accelerating will have a constant speed if it is ____________

A Falling from a height
B In equilibrium
C Moving in a circular path
D Moving in a straight line
E Oscillating