# 12th Physics Unit 16 Chapter Wise Past Papers MCQs

12th Physics unit 16 alternating current past papers MCQs. All MCQs are collected from previous Board papers of Inter part 2. Lahore Board past papers of Physics. Multan Boards past papers chapter-wise. Gujranwala Board past papers of 2nd year Physics.

## 12th Physics Unit 16 MCQs:

### Fsc 2nd Year Physics Chapter 16 MCQs:

The flow of D.C current is opposed by: (AJK. GI, 2015) (DGK, GII, 2017)
(A) Resistor
(B) Inductor
(C) Capacitor
(D) All of these

In the capacitive circuit of A.C quantity when q = 0 the slope of q-t curve is:
(DGK. GI, 2014)
(A) Maximum
(B) Minimum
(C) Zero
(D) Negative

Metal detector consists of: (SWL. GI, 2017) (RWP, DGK. 2018)
(A) L-C circuit
(B) R-L circuit
(C) R-C circuit
(D) RLC series circuit

How through
(A) Inductor
(B) resistor
(C) transistor
(D) capacitor

Choke consumes extremely small: (LHR. GI, 2015) (DGK. 2018)
(A) Current
(B) Charge
(C) Power
(D) Potential

In case of capacitor the unit of reactance is: (LHR. GI, 2016) (SGD. GI, 2018)
(A) Ohm
(B) Mho
(D) Henry

The slope of the q-t curve at any instant of time gives: (BWP. GI, 2016)
(A) Current
(B) Voltage
(C) Charge
(D) Both A and B

#### 12th Class Unit Alternating Current MCQs:

Resistance of Choke is: (FBD. GI, 2014)
(A) Zero
(B) Large
(C) Very small
(D) Infinite

The velocity of an oscillating charge as it moves to and fro along a wire is: (LHR. GI, 2015)
(A) Changing
(B) Constant
(C) infinite
(D) Zero

The reactance of capacitor is equal to: (SGD. GI, 2016)
(А) ОС

100 uF capacitor is connects to an AC-voltage of 24 V and frequency 50Hz. The reactance
of the capacitor is: (SGD. GII, 2016)
(A) 30.812
(B) 31.892
(C) 34.852
(D) 4032

The A.M transmission frequencies range from (LHR. GI, 2014) (FBD. GI, 2016)
(A) 540 kHz to 1000 kHz
(B) 540 kHz to 1600 kHz
(C) 520 kHz to 1600 kHz
(D) 520 kHz to 1400 kHz

#### Past Papers MCQs Of 2nd Year Physics:

Electro magnetic waves are produced by: (LHR. GII, 2014)
(A) Rest charge
(B) Moving charge
(C) Vibrating charge
(D) Positive charge

When we accelerate the charges, which type of waves are produced:
(A) Mechanical waves
(B) Travelling waves
(C) Stationary waves
(D) electromagnetic waves

At high frequency the value of reactance of a capacitor in A.C circuit will be:
(SWL. GI, 2016) (BWP. GI, 2017)
(A) small
(B) zero
(C) large
(D) infinite

The range of F.M transmission frequencies is from: (GI, 2017)
(A) 540 kHz to 1600 kHz
(B) 88 kHz to 10.8 kHz
(C) 88 MHz to 108 MHz
(D) 540 MHz to 1600 MHz

In modulation, a low-frequency signal is known as: (MLN. GI, 2017)
(A) Carrier wave
(B) Fluctuated signal
(C) Modulated-carrier signal
(D) Modulation signal

##### 12th Physics Past Papers Solved MCQs:

If the frequency of A.C supplied is doubled then the capacitive reactance becomes:
(SWL. GI, 2017) (BWP. GI, 2018)
(A) Half
(B) Two times
(C) Four times
(D) One fourth

In pure capacitor A.C circuit, the current I and charge q are: (SGD. GI, 2017)
(A) In phase
(B) Out of phase
(C) Parallel to each other
(D) None of above

An inductor of 1 Henry inductance has a reactance of 500 ohms, then the frequency required is approximate: (BWP. GII, 2017)
(A) 50 Hz
(B) 100 Hz
(C) 80 Hz
(D) 120 Hz