MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Earn 100

What will be RMS value of wattless current?

Important Questions on Alternating Current

EASY
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 80
Write down the expression for wattless current in ac circuit.
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 81
In the transmission of electrical energy, less power factor of circuit means, more power loss. Please explain.
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 82
If the value of resistance and reactance are same for a coil, what will be its power factor?
HARD
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 83
Derive an expression for power in AC circuit. How this formula will change if the circuit does not have reactance and resistance? Also, define the power factor.
HARD
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 84
A coil has a power factor 0.707 at 60 Hz. What will be power factor at 120 Hz?
HARD
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 85
A 10 μF capacitor is charged to a potential of 25 V. The battery is then disconnected and pure 100 mH coil is connected across the capacitor so that LC-oscillations are set up. Calculate the maximum current in the coil.
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 86
A 1.5mH inductor in an LC -circuit stores a maximum energy of 30μJ. What is the maximum current in the circuit?
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 10 - Alternating Current>Exercise>Q 87
In an oscillatory circuit, the self-inductance of the coil used is 10 mH. If the oscillatory frequency of the circuit is 1.0 MHz, find the capacitance of the capacitor connected in the circuit.