42. The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is ________.
45. A sine wave of 15 kHz is changing at a faster rate than a sine wave with a frequency of ________.
(a) 25 kHz (b) 12 kHz (c) 18 kHz (d) 1.3 MHz
Answer
Answer : (b)
Explanation
Explanation :
t = 1/f
Time is indirectly proportional to frequency. So, the lesser value of frequency from giving value will be of faster rate. So, 12 kHz is slower than the 15 kHz. Other rates are higher than the 15 kHz.
5555555555 8. A sine wave voltage is applied across an inductor. When the frequency of the voltage is decreased, the current ________. (a) is increased (b) is decreased (c) does not change (d) momentarily goes to zero
5555555555 32. A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current ________. (a) increases (b) remains constant (c) decreases (d) ceases
AC Fundamentals » Exercise - 1 32. A sine wave voltage is applied across a capacitor, when the frequency of the voltage is increased, the current ________. (a) increases (b) decreases (c) remains the same (d) is zero
AC Fundamentals » Exercise - 1 30. A sine wave voltage is applied across an inductor, when the frequency of voltage is increased, the current ________. (a) increases (b) decreases (c) remains the same (d) is zero
AC Fundamentals » Exercise - 136. If the peal value of a certain sine wave voltage is 10 V, what is they peak to peak value ? (a) 20 V (b) 10 V (c) 5 V (d) 7.07 V