A.C. and D.C. have the same __________?
Correct answer: D. Heating effect through a resistance
- A. Affect in charging a capacitor
- B. Affect in charging a battery
- C. Affect while passing through an inductance
- D. Heating effect through a resistance
Explanation
Both AC and DC produce thermal energy in a resistance, with the heating effect determined by power and, for AC, by the RMS current: P = I²R, in watts when I is in amperes and R is in ohms. Their effects on capacitors and inductors are not generally the same, so students may incorrectly choose capacitor charging by focusing on the fact that both currents can charge a capacitor under some conditions.
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 capacitor and an inductor are connected to A.C. supply. If we double the frequency of A.C. supply then the effect on reactance of capacitor XC and reactance of inductor XL will be: