Question 4626:

• NECO 2009

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 4627:

• NECO 2009

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 4628:

• NECO 2009

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 4629:

• NECO 2009

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 4630:

• NECO 2009

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