The equation PxVyTz = Constant is Charles’ law if
x = 0, y = 1 and z = -1
x = 0, y = -1 and z = 1
x = 1, y = 1 and z = 0
x = 1, y = 1 and z = -1
x = 1, y = 1 and z = 1
Correct answer is A
No explanation has been provided for this answer.
84s
112s
130s
168s
280s
Correct answer is A
No explanation has been provided for this answer.
The most suitable instrument for measuring the diameter of a thin wire is a
meter rule
micrometer screw gauge
pair of dividers
pair of engineer’s calipers
venire calipers
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is correct about volatile liquids? They have
low boiling point
Low evaporating rate
high conductivity
high density
high viscosity
Correct answer is A
No explanation has been provided for this answer.
The work done in extending a spring by 40 mm is 1.52J. Calculate the elastic constant of the spring.
38.8 Nm-1
60.8 Nm-1
190.0 Nm-1
1900.0 Nm-1
3800.0 Nm-1
Correct answer is D
Force = Elastic constant x extension
Work done = \(\frac{1}{2} K \times e^2\)
Given Work done = 1.52J; Elastic constant (k) = ?; e = 40mm = 0.04 m
\(\therefore 1.52 = \frac{k \times (0.04)^2}{2}\)
\(3.04 = k \times 1.6 \times 10^{-3}\)
\(k = \frac{3.04}{1.6} \times 10^3\)
= 1.9 x 10\(^3\)
= 1900 Nm\(^{-1}\)
In the electrical method of making a magnet, the polar the magnet formed depends on the
amount of current passed
direction of the current
nature of the material used
orientation of the magnetic material in space
size of the magnetic material
Correct answer is B
No explanation has been provided for this answer.
zero
2.5
10
12.5
100
Correct answer is A
No explanation has been provided for this answer.
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