- Introduction
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- Alternating current and Alternating EMF
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- Average or mean current
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- Root Mean square value of AC
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- Phasor diagram
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- A.C through pure resistor
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- A.C through pure inductor
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- AC through pure capacitor
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- Circuit containing inductance and resistance in series
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- Circuit containing capacitance and resistance in series
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- LCR series circuit

Solution

Solution

a) Transformer

b) Transistor

c) choke

d) None of these

Solution

a) True

b) False

Solution

a) None of these

b) The power dissipation happens in resistance only in AC circuit

c) The algebraic sum of the rms voltage across the different element of the circuit is equal to the applied rms voltage

d) The algebraic sum of the instantaneous voltage across the different element of the circuit is equal to the applied instantaneous voltage

Solution

a) To step up or step down ac voltage

b) To convert a.c to d.c

c) To step up d.c voltage

d) To convert d.c to a.c

Solution

a) It works on the principle of electromagnetic induction

b) The mechanical energy of the rotation is converted into electrical energy

c) A pair of slip rings are used in the AC generator

d) All the above

Solution

a) The impedence of the circuit is 240.2Ω

b) Power factor is given by .05

c) The peak current in the circuit is .8326 A

d) None of these

Solution

a) 180 out of phase

b) 90 out of phase

c) are in same phase

d) 45 out of phase

Solution

a) A=B

b) A> B

c) A <B

d) none of the above

Solution

a) only in the electric field and is decreasing.

b) only in the electric field and is constant.

c) only in the magnetic field and is decreasing.

d) only in the magnetic field and is constant.

e) in both the electric and magnetic field and is constant.

f) in both the electric and magnetic field and is decreasing.

Solution

Class 12 Maths Class 12 Physics