NEET Physics MCQ: NCERT AC Current & Power

An AC circuit with a non-ohmic resistive element has a current described by $i(t) = 5\sin(\omega t + \pi/3)$ . If the voltage across the element is $v(t) = 10\sin(\omega t)$ , which statement BEST describes the relationship between instantaneous power, average power, and RMS power?

The instantaneous power is constant, the average power is zero, and the RMS power is equal to the peak power.

The instantaneous power fluctuates, the average power is non-zero, and the RMS power is greater than the average power.

The instantaneous power fluctuates, the average power is zero, and the RMS power is equal to the average power.

The instantaneous power is constant, the average power is non-zero, and the RMS power is less than the average power.

Question Tags

📚 Subject:Physics

📑 Chapter:Alternating Current

🎯Topic:Instantaneous, Peak, Rms and Average Value Of A.C

🎓 Ncert Level:Analyzing

🎯Difficulty :Hard

⚡ Time Required :3 mins

🔄Ncert Concepts :AC circuits, Instantaneous power, Average power, RMS values, Phase difference

Related Questions

The peak value of 220 volts of ac mains is

155.6 volts

220.0 volts

311.0 volts

440 volts

Question Tags

📚 Subject:Physics

📑 Chapter:Alternating Current

🎯Topic:Instantaneous, Peak, Rms and Average Value Of A.C

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :2 mins

🔄Ncert Concepts :RMS voltage, Peak voltage

An AC voltage is given by $V = 311\sin(100\pi t)$ . What is the RMS value of the voltage?

311 V

155.5 V

220 V

440 V

Question Tags

📚 Subject:Physics

📑 Chapter:Alternating Current

🎯Topic:Instantaneous, Peak, Rms and Average Value Of A.C

PYQ YEAR: 2022

🎓 Ncert Level:Application

🎯Difficulty :Easy

⚡ Time Required :1 mins

🔄Ncert Concepts :Alternating Current, RMS Voltage, Peak Voltage, Sinusoidal Function

Using an A.C. Voltmeter the potential difference in the electrical line in a house is read to be 234 volt. If the line frequency is known to be 50 cycles/second, the equation for the line voltage is.

$v = 165\,\,\sin (100\pi t)$

$v = 331\,\,\sin (100\pi t)$

$v = 220\,\,\sin (100\pi t)$

$v = 440\,\,\sin (100\pi t)$

Question Tags

📚 Subject:Physics

📑 Chapter:Alternating Current

🎯Topic:Instantaneous, Peak, Rms and Average Value Of A.C

🎓 Ncert Level:Application

🎯Difficulty :Medium

⚡ Time Required :3 mins

🔄Ncert Concepts :RMS Voltage, Peak Voltage, Angular Frequency, Sinusoidal AC Voltage

Using an A.C. Voltmeter the potential difference in the electrical line in a house is read to be 234 volt. If the line frequency is known to be 50 cycles/second, the equation for the line voltage is.

$v = 165\,\,\sin (100\pi t)$