E M B I B E

Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 7

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IMPORTANT

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A primary cell has an emf of $2 V$ , when short-circuited, it gives a current of $4 A$ . Its internal resistance is

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Important Questions on Direct Current Circuits

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IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 8

A wire has resistance of

12

ohms. It is bent to form a circle. The effective resistance between the ends of any of its diameter is

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Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 9

Three

2

ohms resistors are arranged in a triangle. The resistance between any two corners of the triangle is

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Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 10

A

50 V

battery is connected across a

10

ohm resistor. The current obtained is

4.5 A

. The internal resistance of the battery is

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IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 11

Kirchhoff's first law is based on the principle of

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IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 12

Three resistors each of resistance

30 Ω

are arranged to form an equilateral triangle. A battery of emf

2 V

and negligible internal resistance is connected between any two vertices of the triangle. The current delivered by the arrangement is

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Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 13

An electric cable of copper has just one wire of radius

9 mm

. Its resistance is found to be

5 Ω

. This is single copper wire of the cable is replaced by six different well-insulated copper wires each of radius

3 mm

. The total resistance of the cable now becomes:

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Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 14

Five resistance are connected to form a bridge as show in the given circuit diagram. The effective resistance between the points $A$ and $B$ is nearly

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IMPORTANT

Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 15

A current of $2 A$ enters into the arrangement of resistors given below at $A$ and leaves it at $C$ . The potential difference between the points $B$ and $D$ i.e. $V_{B} - V_{D}$ will be