Physics-
General
Easy
Question
Two wires of resistance R1 and R2 have temperature coefficient of resistance
and
, respectively. These are joined in series. The effective temperature coefficient of resistance is :
The correct answer is: 
Related Questions to study
physics-
In the circuit shown : E = 4.0 V, R1 = 2
, E1 = 6.0 V, R2 = 4
and R3 = 2
. The current I1 is :

In the circuit shown : E = 4.0 V, R1 = 2
, E1 = 6.0 V, R2 = 4
and R3 = 2
. The current I1 is :

physics-General
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The current flowing through resistance of 2 ohm in the figure is :

The current flowing through resistance of 2 ohm in the figure is :

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In the figure, if the ammeter reads 5 A and voltmeter reads 50 V, then the resistance R is :

In the figure, if the ammeter reads 5 A and voltmeter reads 50 V, then the resistance R is :

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A voltmeter reading up to 1000 mV is calibrated by a potentiometer. An emf of 1.08 V is balanced across 5.4 m length of the wire. When voltmeter reading is 0.9 V, the balancing length is 4.55 m. The error in the voltmeter reading is :
A voltmeter reading up to 1000 mV is calibrated by a potentiometer. An emf of 1.08 V is balanced across 5.4 m length of the wire. When voltmeter reading is 0.9 V, the balancing length is 4.55 m. The error in the voltmeter reading is :
physics-General
physics-
Which part represents the negative dynamic resistance ?

Which part represents the negative dynamic resistance ?

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Variation of current passing through a conductor at the voltage applied across its ends is varied as shown in the adjoining diagram. If the resistance is determined at the points A, B, C and D, we will find that resistances at :

Variation of current passing through a conductor at the voltage applied across its ends is varied as shown in the adjoining diagram. If the resistance is determined at the points A, B, C and D, we will find that resistances at :

physics-General
physics-
In the network shown in the figure, each resistance is 1
. The effective resistance between A and B is:

In the network shown in the figure, each resistance is 1
. The effective resistance between A and B is:

physics-General
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In the circuit diagram, the potential difference across the plates of the capacitor C is :

In the circuit diagram, the potential difference across the plates of the capacitor C is :

physics-General
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The equivalent resistance of the network shown in the figure between the points A and B is :

The equivalent resistance of the network shown in the figure between the points A and B is :

physics-General
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In the arrangement of resistances shown in the figure, the potential difference between the points B and D will be zero when the unknown resistance X is :

In the arrangement of resistances shown in the figure, the potential difference between the points B and D will be zero when the unknown resistance X is :

physics-General
physics-
What will be the equivalent resistance between the two points A and D ?

What will be the equivalent resistance between the two points A and D ?

physics-General
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In the circuit diagram shown below, the magnitude and direction of the flow of current respectively would be:

In the circuit diagram shown below, the magnitude and direction of the flow of current respectively would be:

physics-General
physics-
In the given current distribution, what is the value of I ?

In the given current distribution, what is the value of I ?

physics-General
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The current in the branch CD in the circuit shown below will be :

The current in the branch CD in the circuit shown below will be :

physics-General
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In the following figure, the reading of the ammeter A, when the internal resistance of the battery is zero is :

In the following figure, the reading of the ammeter A, when the internal resistance of the battery is zero is :

physics-General