A \(5-\)ampere fuse wire can withstand a maximum power of \(1\) watt in a circuit. The resistance of the fuse wire is:

1. \(5\) \(\Omega\) 2. \(0.04~\Omega\)
3. \(0.2~\Omega\) 4. \(0.4~\Omega\)

Subtopic:  Heating Effects of Current |
 86%
From NCERT
AIPMT - 2005
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When a wire of uniform cross-section a, length l, and resistance R is bent into a complete circle, the resistance between any two diametrically opposite points will be:

1. R/2

2. R/4

3. R/8

4. 4R

Subtopic:  Combination of Resistors |
 71%
From NCERT
AIPMT - 2005
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For the network shown in the figure below, the value of the current i is:

   

1. 18V5

2. 5V9

3. 9V35

4. 5V18

Subtopic:  Wheatstone Bridge |
 74%
From NCERT
AIPMT - 2005
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A car battery of emf \(12~\text{V}\) and internal resistance \(5\times 10^{-2}~\Omega\) receives a current of \(60~\text{A}\) from an external source. The terminal voltage of the battery is:

1. \(12~\text{V}\) 2. \(9~\text{V}\)
3. \(15~\text{V}\) 4. \(20~\text{V}\)
Subtopic:  EMF & Terminal Voltage |
 50%
From NCERT
AIPMT - 2000
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If there are two bulbs of (\(40~\text{W},200~\text{V}\)), and (\(100~\text{W},200~\text{V}\)), then the correct relation for their resistance is:

1. \(\mathrm{R}_{40}<\mathrm{R}_{100}\)
2. \(\mathrm{R}_{40}>\mathrm{R}_{100}\)
3. \(\mathrm{R}_{40}=\mathrm{R}_{100}\)
4. no relation can be predicted

Subtopic:  Heating Effects of Current |
 87%
From NCERT
AIPMT - 2000
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When three identical bulbs are connected in series, the consumed power is 10 W. If they are now connected in parallel then the consumed power will be:
1.  30 W
2.  90 W
3.  \(\frac{10}{3}\) W
4.  270 W

Subtopic:  Heating Effects of Current |
 67%
From NCERT
AIPMT - 1998
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According to the Faraday Law of electrolysis, the mass deposited at electrode will be proportional to:

1. m ∝ I2

2. m ∝ Q

3. m ∝ Q2

4. 'm' does not depend on Q

Subtopic:  Current & Current Density |
 72%
From NCERT
AIPMT - 2000
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In a hot wire ammeter due to the flowing of the current, the temperature of the wire is increased by 5° C. If the value of the current is doubled, then the increase in temperature will be:
1.  15° C
2.  20° C
3.  25° C
4.  30° C

Subtopic:  Heating Effects of Current |
 67%
From NCERT
AIPMT - 1998
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The potentiometer is best for measuring voltage, as:

1. It has a sensitive galvanometer
2. It has wire of high resistance
3. It measures p.d. like in closed circuit
4. It measures p.d. like in open circuit

Subtopic:  Meter Bridge & Potentiometer |
From NCERT
AIPMT - 2000
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When three identical bulbs of 60 watts and 200-volt rating are connected in series to a 200-volt supply, the power drawn by them will be:

1. 180 watts
2. 10 watts
3. 20 watts
4. 60 watts

Subtopic:  Heating Effects of Current |
 72%
From NCERT
AIPMT - 2004
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