In the figure, a carbon resistor has bands of different colours on its body as shown. The value of the resistance is:

                                            

1.  2.2 kΩ

2.  3.3 kΩ

3.  5.6 kΩ

4.  9.1 kΩ

Subtopic:  Colour Coding of Resistors (OLD NCERT) |
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A light bulb, a capacitor and a battery are connected together as shown below with the switch S initially open. When the switch S is closed, which one of the following is true?

      

1. The bulb will light up for an instant when
    the capacitor starts charging.
2. The bulb will light up when
    the capacitor is fully charged.
3. The bulb will not light up at all.
4. The bulb will light up and go off at regular intervals.

Subtopic:  RC Circuit (OLD NCERT) |
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In the given figure each plate of capacitance C has partial value of charge equal to:

1. CE

2. CER1R2r

3. CER2R2+r

4. CER1R1r

Subtopic:  RC Circuit (OLD NCERT) |
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A 4 μF capacitor and a resistance of 2.5 MΩ are in series with a 12 V battery. The time after which the potential difference across the capacitor is 3 times the potential difference across the resistor is: [Given ln(2)= 0.693] 

1. 13.86 s

2. 6.93 s

3. 7 s

4. 14 s

Subtopic:  RC Circuit (OLD NCERT) |
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A carbon resistor (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be:

1. Violet - Yellow - Orange - Silver

2. Yellow - Violet - Orange - Silver

3. Yellow - Green - Violet - Gold

4. Green - Orange - Violet - Gold

Subtopic:  Colour Coding of Resistors (OLD NCERT) |
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In the figure below, what is the potential difference between the point A and B and between B and C, respectively, in steady state?

1. VAB=VBC=100V

2. VAB=75V,VBC=25V

3. VAB=25V,VBC=75V

4. VAB=VBC=50V

Subtopic:  RC Circuit (OLD NCERT) |
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When the key K is pressed at time t = 0, which of the following statement about the current I in the resistor AB of the given circuit is true?
          

1. I = 2 mA at all t
2. I oscillates between 1 mA and 2 mA
3. I = 1 mA at all t
4. At t = 0 , I = 2 mA and with time, it goes to 1 mA

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The colour code of resistance is given below:

The values of resistance and tolerance, respectively are:

1.  47 kΩ, 10%

2.  4.7 kΩ, 5%

3.  470 Ω, 5%

4.  470 kΩ, 5%

Subtopic:  Colour Coding of Resistors (OLD NCERT) |
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A capacitor of 4 μF is connected as shown in the circuit. The internal resistance of the battery is 0.5 Ω. The amount of charge on the capacitor plates will be:

  

1. 0 μC

2. 4 μC

3. 16 μC

4. 8 μC

Subtopic:  RC Circuit (OLD NCERT) |
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Consider a capacitor-charging circuit. Let Q1 be the charge given to the capacitor in a time interval of 10 ms and Q2 be the charge given in the next time interval of 10 ms. Let 10 µC charge be deposited in a time interval J, and the next 10 µC charge is deposited in the next time interval t2

1.   Q1 > Q2 , t1 > t2

2.   Q1 > Q2 , t1 < t2

3.   Q1 < Q2 , t1 > t2

4.   Q1 < Q2 ,  t< t2

Subtopic:  RC Circuit (OLD NCERT) |
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