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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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 |
68%
From NCERT
AIPMT - 1998
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The current in 8 Ω resistance is (in the figure below):

1.  0.69 A
2.  0.92 A
3.  1.30 A
4.  1.6 A

Subtopic:  Kirchoff's Voltage Law |
56%
From NCERT
AIPMT - 1999
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If the power dissipated in 5 Ω is 20 W then the power dissipated in 4 Ω is:

1.  4 W

2. 6 W

3. 10 W

4. 20 W

Subtopic:  Heating Effects of Current |
74%
From NCERT
AIPMT - 1999
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The value of R for which power in it is maximum is:

1. 3 Ω
2. 6 Ω
3. 12 Ω
4. 9 Ω

Subtopic:  Heating Effects of Current |
75%
From NCERT
AIPMT - 1999
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The terminal potential difference of a cell is greater than its emf when:

 1 A battery of less emf is connected in its series. 2 A battery of higher emf is connected in its series. 3 A battery of higher emf is connected in its parallel. 4 A battery of less emf is connected in its parallel.

Subtopic:  EMF & Terminal Voltage |
From NCERT
AIPMT - 1999
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The net resistance of the circuit between $$A$$ and $$B$$ is:

 1 $$\frac{8}{3}~\Omega$$ 2 $$\frac{14}{3}~\Omega$$ 3 $$\frac{16}{3}~\Omega$$ 4 $$\frac{22}{3}~\Omega$$
Subtopic:  Wheatstone Bridge |
89%
From NCERT
AIPMT - 2000
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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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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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