# In the circuit shown in the figure below, the current supplied by the battery is:                                       1. $$2$$ A 2. $$1$$ A 3. $$0.5$$ A 4. $$0.4$$ A

Subtopic:  Wheatstone Bridge |
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The figure below shows a network of currents. The current $$i$$ will be:

1. $$3~\text{A}$$
2. $$13~\text{A}$$
3. $$23~\text{A}$$
4. $$-3~\text{A}$$

Subtopic:  Kirchoff's Current Law |
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PMT - 1995
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A battery of internal resistance $$r$$, when connected across $$2~\Omega$$ resistor supplies a current of $$4~\text{A}$$. When the battery is connected across a $$5~\Omega$$ resistor, it supplies a current of $$2~\text{A}$$. The value of $$r$$ is:
 1 $$2~\Omega$$ 2 $$1~\Omega$$ 3 $$0.5~\Omega$$ 4 zero
Subtopic:  EMF & Terminal Voltage |
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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:  Heating Effects of Current |
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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:  Heating Effects of Current |
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What is the reading of the voltmeter of resistance $$1200~\Omega$$ connected in the following circuit diagram?

 1 $$2.5$$ V 2 $$5.0$$ V 3 $$7.5$$ V 4 $$40$$ V
Subtopic:  Combination of Resistors |
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The dependence of resistivity $$(\rho)$$ on the temperature $$(T)$$ of a semiconductor is, roughly, represented by:

 1 2 3 4
Subtopic:  Derivation of Ohm's Law |
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Current through the $$2~\Omega$$ resistance in the electrical network shown is:

 1 zero 2 $$1$$ A 3 $$3$$ A 4 $$5$$ A
Subtopic:  Grouping of Cells |
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Two batteries, one of emf $$18~\text{V}$$ and internal resistance $$2~\Omega$$ and the other of emf $$12$$ V and internal resistance $$1~\Omega$$, are connected as shown. Reading of the voltmeter is:
(if voltmeter is ideal)

1. $$14$$ V
2. $$15$$ V
3. $$18$$ V
4. $$30$$ V

Subtopic:  Grouping of Cells |
78%
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The metre bridge shown is in a balanced position with $$\frac{P}{Q} = \frac{l_1}{l_2}$$. If we now interchange the position of the galvanometer and the cell, will the bridge work? If yes, what will be the balanced condition?

1. Yes, $$\frac{P}{Q}=\frac{l_1-l_2}{l_1+l_2}$$
2. No, no null point
3. Yes, $$\frac{P}{Q}= \frac{l_2}{l_1}$$
4. Yes, $$\frac{P}{Q}= \frac{l_1}{l_2}$$

Subtopic:  Meter Bridge & Potentiometer |
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NEET - 2019
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