EASY
12th Nagaland Board
IMPORTANT
Earn 100

Draw a circuit diagram of a Wheatstone bridge. Using Kirchhoff’s rules, obtain the balance condition for the network.

Important Questions on Current Electricity

HARD
12th Nagaland Board
IMPORTANT

In the arrangement of cells and resistors shown in the figure, calculate the current in each resistor.

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EASY
12th Nagaland Board
IMPORTANT
A heater coil is rated 100W, 200V. It is cut into two identical parts. Both parts are connected together in parallel to the same source of 200V. Calculate the energy liberated per second in the new combination.
EASY
12th Nagaland Board
IMPORTANT
A silver wire has a resistance of 2.7 at 100°C. Determine the temperature coefficient of resistivity of silver.
EASY
12th Nagaland Board
IMPORTANT
The storage battery of a car has an emf of 12V. If the internal resistance of the battery is 0.4, what is the maximum current that can be drawn from the battery?
EASY
12th Nagaland Board
IMPORTANT
Derive the expression for equivalent emf (Eeq) for the cells in series combination.
EASY
12th Nagaland Board
IMPORTANT

In a meter bridge, the balance point is found to be at 39.5cm from A. When the resistor Y is of 12.5 .

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Determine the resistance of X.

EASY
12th Nagaland Board
IMPORTANT

In a meter bridge, the balance point is found to be at 39.5cm from A. When the resistor Y is of 12.5 .

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Determine balance point of the bridge above, if X and Y are interchanged.

EASY
12th Nagaland Board
IMPORTANT

In a meter bridge, the balance point is found to be at 39.5cm from A. When the resistor Y is of 12.5 .

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What happens if the galvanometer and cell are interchanged at the balance point of the bridge?