मराठी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान इयत्ता ११

A capacitor acts as an infinite resistance for ______. - Physics

Advertisements
Advertisements

प्रश्न

A capacitor acts as an infinite resistance for ______.

पर्याय

  • DC

  • AC

  • DC as well as AC

  • neither AC nor DC

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

A capacitor acts as an infinite resistance for DC.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 17: Alternating Current - MCQ [पृष्ठ ३२९]

APPEARS IN

एचसी वर्मा Concepts of Physics Vol. 2 [English] Class 11 and 12
पाठ 17 Alternating Current
MCQ | Q 1 | पृष्ठ ३२९

संबंधित प्रश्‍न

Show that the current leads the voltage in phase by π/2 in an AC circuit containing an ideal capacitor ?


A current i1 = i0 sin ωt passes through a resistor of resistance R. How much thermal energy is produced in one time period? A current i2 = −i0 sin ωt passes through the resistor. How much thermal energy is produced in one time period? If i1 and i2 both pass through the resistor simultaneously, how much thermal energy is produced? Is the principle of superposition obeyed in this case?


An AC source producing emf ε = ε0 [cos (100 π s−1)t + cos (500 π s−1)t] is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be i1 cos [(100 π s−1)t + φ1) + i2 cos [(500π s−1)t + ϕ2]. So,


The dielectric strength of air is 3.0 × 106 V/m. A parallel-plate air-capacitor has area 20 cm2 and plate separation 0.10 mm. Find the maximum rms voltage of an AC source that can be safely connected to this capacitor.


A transformer has 50 turns in the primary and 100 in the secondary. If the primary is connected to a 220 V DC supply, what will be the voltage across the secondary?


Suppose the initial charge on the capacitor is 6 mC. What is the total energy stored in the circuit initially? What is the total energy at later time?


Average power supplied to a capacitor over one complete cycle is ______.


The electric mains supply in our homes and offices is a voltage that varies like a sine function with time such a voltage is called ... A... and the current driven by it in a circuit is called the ... B... Here, A and B refer to ______.

Of the following about capacitive reactance which is correct?

A device ‘X’ is connected to an a.c source. The variation of voltage, current and power in one complete cycle is shown in figure.

  1. Which curve shows power consumption over a full cycle?
  2. What is the average power consumption over a cycle?
  3. Identify the device ‘X’.


In the LCR circuit shown in figure, the ac driving voltage is v = vm sin ωt.

  1. Write down the equation of motion for q (t).
  2. At t = t0, the voltage source stops and R is short circuited. Now write down how much energy is stored in each of L and C.
  3. Describe subsequent motion of charges.


Define Capacitive reactance.


An iron cored coil is connected in series with an electric bulb with an AC source as shown in figure. When iron piece is taken out of the coil, the brightness of the bulb will ______.


A 40 µF capacitor is connected to a 200 V. 50 Hz ac supply. The rms value of the current on the circuit is, nearly ______.


In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit?


When an AC voltage of 220 V is applied to the capacitor C ______.


A 10 µF capacitor is connected to a 210 V, 50 Hz source as shown in figure. The peak current in the circuit is nearly ______.

(π = 3.14)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×