Which of the following acts as a circuit protection device?
1. Fuse
2. Conductor
3. Inductor
4. Switch

Subtopic:  Heating Effects of Current |
 85%
From NCERT
NEET - 2019
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Six similar bulbs are connected as shown in the figure with a DC source of emf \(E\) and zero internal resistance. The ratio of power consumption by the bulbs when (i) all are glowing and (ii) in the situation when two from section \(\mathrm{A}\) and one from section \(\mathrm{B}\) are glowing, will be:

      

1. \(2:1\) 2. \(4:9\)
3. \(9:4\) 4. \(1:2\)
Subtopic:  Heating Effects of Current |
 64%
From NCERT
NEET - 2019
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In the circuits shown below, the readings of the voltmeters and the ammeters will be:

 

1. \(V_2>V_1~\text{and}~i_1= i_2\) 2. \(V_2=V_1~\text{and}~i_1> i_2\)
3. \(V_2=V_1~\text{and}~i_1= i_2\) 4. \(V_2>V_1~\text{and}~i_1> i_2\)

Subtopic:  Kirchoff's Voltage Law |
 52%
From NCERT
NEET - 2019
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Kirchhoff’s first and second laws for electrical circuits are consequences of:

1. conservation of energy.
2. conservation of electric charge and energy respectively.
3. conservation of electric charge.
4. conservation of energy and electric charge respectively.

Subtopic:  Kirchoff's Voltage Law | Kirchoff's Current Law |
 74%
From NCERT
AIPMT - 2006
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The power dissipated across the 8 Ω resistor in the circuit shown here is 2 W. The power dissipated in watts across the 3 Ω resistor is:


1. 2.0 2. 1.0
3. 0.5 4. 3.0
Subtopic:  Heating Effects of Current |
 69%
From NCERT
AIPMT - 2006
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Two cells having the same emf, are connected in series through an external resistance R. Cells have internal resistance r1 and r2 respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is:

1. r1-r2

2. r1+r22

3. r1-r22

4. r1+r2

Subtopic:  Grouping of Cells |
From NCERT
AIPMT - 2006
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In the circuit shown below, if a conducting wire is connected between points \(A\) and \(B\), the current in this wire will: (All resistances are given in ohms)
         
1. flow from \(A\) to \(B\)
2. flow in the direction which will be
decided by the value of \(V\)
3. be zero
4. flow from \(B\) to \(A\)
Subtopic:  Kirchoff's Voltage Law |
 53%
From NCERT
AIPMT - 2006
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Three resistances \(\mathrm P\), \(\mathrm Q\), and \(\mathrm R\), each of \(2~\Omega\) and an unknown resistance \(\mathrm{S}\) form the four arms of a Wheatstone bridge circuit. When the resistance of \(6~\Omega\) is connected in parallel to \(\mathrm{S}\), the bridge gets balanced. What is the value of \(\mathrm{S}\)?
1. \(2~\Omega\)
2. \(3~\Omega\)
3. \(6~\Omega\)
4. \(1~\Omega\)

Subtopic:  Wheatstone Bridge |
 82%
From NCERT
AIPMT - 2007
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The total power dissipated in watts in the circuit shown below is:

1. 16 W 2. 40 W
3. 54 W 4. 4 W
Subtopic:  Heating Effects of Current |
 87%
From NCERT
AIPMT - 2007
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A current of \(3~\text{A}\) flows through the \(2~\Omega\) resistor shown in the circuit. The power dissipated in the \(5~\Omega\) resistor is:
    

1. \(4~\text{W}\) 2. \(2~\text{W}\)
3. \(1~\text{W}\) 4. \(5~\text{W}\)
Subtopic:  Heating Effects of Current |
 80%
From NCERT
AIPMT - 2008
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