NEET Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Alternating Current Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

## MCQ on Alternating Current

**1. What is the frequency of a 5μF capacitor that has a reactance of 1000 Ω?**

(a) 200 cycle/sec

(b) 100/π cycle/sec

(c) 5000 cycles/sec

(d) 1000/π cycles/sec

**Answer**

Answer: (b) 100/π cycle/sec

**2. What is the reciprocal of impedance?**

(a) Admittance

(b) Inductance

(c) Reactance

(d) Conductance

**Answer**

Answer: (d) Conductance

**3. What is the time taken by the alternating current of 50 Hz with an r.m.s value of 10 ampere to reach from zero to a maximum value and the peak value of current?**

(a) 2 × 10^{-2} sec and 14.24 amp

(b) 5 × 10^{-3} sec and 8.07 amp

(c) 5 × 10^{-3} sec and 14.14 amp

(d) 1 × 10^{-2} sec and 7.07 amp

**Answer**

Answer: (c) 5×10^{-3} sec and 14.14 amp

**4. What is the voltage applied across the resonant circuit if the ac voltage across resistance R, inductance L and capacitance C is 5 V, 10 V and 10 V respectively?**

(a) 5 V

(b) 10 V

(c) 20 V

(d) 25 V

**Answer**

Answer: (a) 5 V

**5. Why can’t the DC ammeter measure an alternating current?**

(a) AC cannot pass through a DC ammeter

(b) AC changes its direction

(c) AC is virtual

(d) The average value of a complete cycle is zero

**Answer**

Answer: (d) The average value of a complete cycle is zero

**6. If the peak current is given by I_{p}, then how much power is dissipated by a sinusoidal ac current which flows through resistor of resistance R?**

**Answer**

Answer: (d) \(\frac{1}{2} I_{p}^{2} R\)

**7. What is the frequency of ac mains in India?**

(a) 120 Hz

(b) 60 Hz

(c) 50 Hz

(d) 30 Hz

**Answer**

Answer: (c) 50 Hz

**8. If a current I given by I _{0}sin(ωt−\(\frac{\pi}{2}\)) flows across an AC circuit with potential E=E_{0}sinωt, then what is the power consumption in the circuit?**

**Answer**

Answer: (d) P = 0

**9. What is the r.m.s current value of an alternating current given by the equation of i=i _{1}cosωt+i_{2}sinωt ?**

**Answer**

Answer: (a) \(\frac{1}{\sqrt{2}}\left(i_{1}^{2}+i_{2}^{2}\right)^{1 / 2}\)

**10. What is the peak value of the voltage of an electric lamp connected to a 220 V, 50 Hz supply?**

(a) 311 V

(b) 320 V

(c) 211 V

(d) 210 V

**Answer**

Answer: (a) 311 V