Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Alternating Current question

2022 · 28 Jul · Shift 2 · Q53
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Alternating Current
  5. /2022 · 28 Jul · Shift 2 · Q53

Alternating Current question

2022 · 28 Jul · Shift 2 · Q53

JEE MainPhysicsAlternating CurrentMCQ+4 / −1
A transformer operating at primary voltage 8 kV8 \,\mathrm{kV}8kV and secondary voltage 160 V160 \mathrm{~V}160 V serves a load of 80 kW80 \mathrm{~kW}80 kW. Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be
  1. A
    800 Ω800 \,\Omega800Ω and 1.06 Ω1.06 \,\Omega1.06Ω
  2. B
    10 Ω10 \,\Omega10Ω and 500 Ω500 \,\Omega500Ω
  3. C
    800 Ω800 \,\Omega800Ω and 0.32 Ω0.32 \,\Omega0.32Ω
  4. D
    1.06 Ω1.06 \,\Omega1.06Ω and 500 Ω500 \,\Omega500Ω
PreviousNext

More from Alternating Current

  • An AC source is connected to an inductance of 100 mH, a capacitance of 100 μ F and a resistance of 120 Ω as shown in figure. The time in which the resistance having a thermal capacity 2 J/∘ C will get heated by 16… Includes diagram2022 · Numerical
  • A telegraph line of length 100 km has a capacity of 0.01 μ F/km and it carries an alternating current at 0.5 kilo cycle per second. If minimum impedance is required, then the value of the inductance that needs to be introduced in…2022 · Numerical
  • In the given circuit, the magnitude of VL and VC are twice that of VR. Given that f = 50 Hz, the inductance of the coil is Kπ1​ mH. The value of K is ​. Includes diagram2022 · Numerical
  • An alternating emf E=440sin100πt is applied to a circuit containing an inductance of π2​​H. If an a.c. ammeter is connected in the circuit, its reading will be :2022 · MCQ
  • A coil of inductance 1 H and resistance 100Ω is connected to a battery of 6 V. Determine approximately : (a) The time elapsed before the current acquires half of its steady - state value. (b) The energy stored in the magnetic…2022 · MCQ
  • A circuit element X when connected to an a.c. supply of peak voltage 100 V gives a peak current of 5 A which is in phase with the voltage. A second element Y when connected to the same a.c.…2022 · MCQ
  • A capacitor of capacitance 500 μ F is charged completely using a dc supply of 100 V. It is now connected to an inductor of inductance 50 mH to form an LC circuit. The maximum current in LC circuit will be ​ A.2022 · Numerical
  • For a series LCR circuit, I vs ω curve is shown : (a) To the left of ω r, the circuit is mainly capacitive. (b) To the left of ω r, the circuit is mainly inductive. (c) At ω r, impedance of the circuit is equal… Includes diagram2022 · MCQ