EASY
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Amount of deflection of the galvanometer depends on _____.

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Important Questions on Current Electricity

MEDIUM
In the following network, the current flowing through 15 Ω  resistance is

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MEDIUM

When the value of R in the balanced Wheatstone bridge, shown in the figure, is increased from 5 Ω to 7 Ω, the value of S has to be increased by 3 Ω in order to maintain the balance. What are the initial values of S?

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EASY

In the circuit given below, it is observed that the current I is independent of the value of resistance r6. Then the resistance values satisfy

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MEDIUM

A Wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistances P and Q

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EASY
Which of the following will NOT be observed when a multimeter (operating in resistance measuring mode) probes connected across a component, are just reversed?
MEDIUM

In the following circuit, the effective resistance between the points P and Q is

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HARD

he equivalent resistance of the circuit between A and B is

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HARD

In the balanced condition, the values of the resistances of the four arms of a Wheatstone bridge are shown in the figure below. The resistance R3 has temperature coefficient 0.0004°C-1. If the temperature of R3 is increased by 100°C, the voltage developed between S and T will be n V. Write the value of 100n to the nearest integer.

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EASY
In the circuit given below, the value of resistance X, when the potential difference between the points B and D is zero, will be
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EASY

In the given circuit, it is observed that the current I is independent of the value of resistance R5. Then, the resistance value must satisfy

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EASY

A battery of 6 V is connected to the circuit as shown below. The current I drawn from the battery is

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MEDIUM

In the circuit shown PR, the reading of the galvanometer is same with switch S open or closed, then

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EASY
Four resistances of 15 Ω, 12 Ω, 4 Ω and 10 Ω respectively in cyclic order to form Wheatstone’s network. The resistance that is to be connected in parallel with the resistance of 10 Ω to balance the network is ______________ Ω.
HARD

A non-zero current passes through the galvanometer G shown in the circuit when the key K is closed and its value does not change when the key is opened. Then, which of the following statement(s) is/are true?

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EASY

Current measured by the ammeter A in the reported circuit when no current flows through 10Ω resistance, will be _____ A.

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MEDIUM

The value of current I as shown in the given circuit diagram is

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MEDIUM

The value of current i1 flowing from A to C in the circuit diagram is :

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MEDIUM
In the circuits shown below, the readings of the voltmeters and the ammeters will be,

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