MEDIUM
12th Odisha Board
IMPORTANT
Earn 100

State Kirchhoff's laws for an electrical network. Apply them to obtain the condition of balance of a Wheatstone bridge.

Important Questions on Direct Current Circuits

MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 7
State and explain Kirchhoff's law for an electrical network. Apply them to obtain expression for the equivalent resistance when a number of resistors are connected in series.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 7
State and explain Kirchhoff's law for an electrical network. Apply them to obtain expression for the equivalent resistance when a number of resistors are connected in parallel.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 8
Draw a neat circuit diagram of the Wheatstone bridge and mention the importance of such a bridge. Also, obtain its condition of balance.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 1
The emf of a cell is 12 V. In a closed circuit having a resistance of 10 Ω, it sends a current of 1 A. Find the internal resistance of cell.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 2
The potential difference between the terminal of a battery of emf 6V and internal resistance 1Ω drops to 5.8V when connected to an external path of resistance R. Find the value of R.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 3
An ideal battery sends a current of 5A in a resistor. When another resistor of 10Ω is connected in parallel, the current is increased to 6A. Find the resistance of the first resistor.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 4
A 10Ω resistor and a 20Ω resistor are connected in parallel. The combination is connected to a 5.5V cell in one side and a 30Ω rheostat in another side. The sliding contact of rheostat is connected to the other terminal of the battery through an ammeter. Find the maximum and minimum value of current in the circuit. Neglect the internal resistance of the cell.
EASY
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 6 - Direct Current Circuits>MODEL QUESTIONS>Q 5

Twelve resistors each of resistance r are joined to form a cube as shown in the figure given below. Find the equivalent resistance between the diagonally opposite points A and F.

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