A $$5\text-$$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: Â Heating Effects of Current |
Â 86%
From NCERT
AIPMT - 2005
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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: Â Heating Effects of Current |
Â 87%
From NCERT
AIPMT - 2007
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If the voltage across a bulb rated $$(220~\text{V}\text-100~\text{W})$$ drops by $$2.5\%$$ of its rated value, the percentage of the rated value by which the power would decrease is:
1. $$20\%$$
2. $$2.5\%$$
3. $$5\%$$
4. $$10\%$$

Subtopic: Â Heating Effects of Current |
Â 77%
From NCERT
AIPMT - 2012
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Power consumed in the given circuit is $$P_1$$. On interchanging the position of $$3~\Omega$$ and $$12~\Omega$$ resistances, the new power consumption is $$P_2$$. The ratio of $$\frac{P_2}{P_1}$$ is:

 1 $$2$$ 2 $$1 \over 2$$ 3 $$3 \over 5$$ 4 $$2 \over 5$$
Subtopic: Â Heating Effects of Current |
Â 69%
From NCERT
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For the given circuit, the value of the resistance in which the maximum heat is produced is:

1. $$2~\Omega$$
2. $$6~\Omega$$
3. $$4~\Omega$$
4. $$12~\Omega$$

Subtopic: Â Heating Effects of Current |
Â 63%
From NCERT
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The charge flowing through a resistance $$R$$ varies with time $$t$$ as $$Q=at-bt^2,$$ where $$a$$ and $$b$$ are positive constants. The total heat produced in $$R$$ is:
 1 $$\dfrac{a^3R}{3b}$$ 2 $$\dfrac{a^3R}{2b}$$ 3 $$\dfrac{a^3R}{b}$$ 4 $$\dfrac{a^3R}{6b}$$
Subtopic: Â Heating Effects of Current |
Â 56%
From NCERT
NEET - 2016
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A coil heating a bucket full of water raises the temperature by $$5^{\circ}\text{C}$$ in $$2$$ min. lf the current in the coil is doubled, what will be the change in the temperature of water in $$1$$ min? (Assume no loss of heat to the surroundings)
 1 $$10^{\circ}\text{C}$$ 2 $$5^{\circ}\text{C}$$ 3 $$20^{\circ}\text{C}$$ 4 $$15^{\circ}\text{C}$$
Subtopic: Â Heating Effects of Current |
Â 61%
From NCERT
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