One difference between a reactance and a resistance in an alternating current circuit is
resistance is larger than reactance
energy is not diaaipated in a reactance
energy is stored in a resistance but not in a reactance
the current in a reactance is lower than in the resistance
Correct answer is D
No explanation has been provided for this answer.
10V
20V
25V
400V
Correct answer is B
\(V^2 = PR = V = \sqrt{4} \times 100\)
= 20V
A lamp is rated 240V 60W, calculate the resistance of its filament
240\(\Omega\)
360\(\Omega\)
960\(\Omega\)
1440\(\Omega\)
Correct answer is C
R = \(\frac{V^2}{P} = \frac{240^2}{60} = 960\Omega\)
100.0C
10.0C
1.0C
0.1C
Correct answer is A
Q = it
= 10 x 10 = 100C
Which of the following factors does not affect the the electric resistance of a wire?
length
mass
temperature
cross sectional area
Correct answer is B
No explanation has been provided for this answer.