The capacitive reactance of the AC circuit increases:
Correct answer: B. By decreasing the frequency of AC
- A. By increasing the frequency of AC
- B. By decreasing the frequency of AC
- C. Does not depend upon the frequency of the AC voltage
- D. None of these
Explanation
Capacitive reactance (Xc) is inversely proportional to the frequency of the AC voltage. As the frequency decreases, the capacitive reactance increases. The relationship is given by the formula: Xc = 1 / 2πfC Where 'f' is the frequency and 'C' is the capacitance.
Last updated
About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?
A 220 V main supply is connected to a resistance of 100 k ohms. The effective current is
A 50-m coil carries a current of 2 amperes. The energy stored in a magnetic field is:
A.C. and D.C. have the same __________?
A.C and D.C have the same: