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12th Odisha Board
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Twelve identical resistors each having resistance r are joined to form a skeleton cube. The equivalent resistance between any two diagonally opposite ends will be

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Important Questions on Direct Current Circuits

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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 18
A cell having an emf of 3V and negligible internal resistance is connected across a series combination of three resistance of values 3Ω, 4Ω and 5Ω. The potential difference across the 4Ω resistor is
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12th Odisha Board
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Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 19
An electrician has only two resistance. By using them he is able to obtain resistance of 3Ω, 4Ω, 12Ω and 16Ω. The two resistance are 
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 20
A total number of 24 cells each of emf 1.5V and internal resistance 0.5Ω are combination in mixed grouping to deliver maximum current in an external resistor of 3Ω. There are m rows of such cells in parallel combination with n cells in series in each row. Then the value of m and n are
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 1
Define electromotive force (i.e. emf) of a cell.
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 2
Mention the main components of a simple d.c. circuit.
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 3
Can the potential difference across a battery be greater than its emf?
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 4
Does a conductor become charged when a current is passed through it?
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12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 5
How will you connect two resistors, each of resistance R to get the maximum current in a circuit of fixed emf?