When an a.c. voltage is applied to a capacitor, no power is consumed because the current
leads the voltage by 90°
lags behind the voltage by 90°
and voltage are in phase
and voltage are 180° out of phase
Correct answer is A
In a capacitive circuit, current leads voltage by 90°, or voltage lags current by 90°
constant (ε) and area
area and distance.
constant (ε) only
distance only
Correct answer is B
No explanation has been provided for this answer.
0.25 W
4. 00 W
38.4W
60.00W
Correct answer is D
Electrical power = IV or I2R or (V)/R
With V = 240v, R = 960Ω
Power (V2)/R = (240 X 240)/960
=60Watts
The main purpose of the transformer in an a.c radio set is to?
increase power to the radio
step up the voltage
convert energy from a.c to d.c
step down the voltage
Correct answer is D
No explanation has been provided for this answer.
The production and type of charge of a body can only be accounted for by the?
deficiency or surplus of electrons
equibrium in protons and neutrons
deficiency or surplus of protrons
deficiency or surplus of neutrons
Correct answer is A
No explanation has been provided for this answer.