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प्रश्न
To increase the effective resistance in a circuit, the resistors are connected in _______________ .
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उत्तर
To increase the effective resistance in a circuit, the resistors are connected in series.
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संबंधित प्रश्न
Complete the following :-
(a)
Write any two characteristics of a series combination of resistors.
Find the equivalent resistance between points A and B.
Find the equivalent resistance between points A and B
An electrical appliance has a resistance of 25 Ω. When this electrical appliance is connected to a 230 V supply line, the current passing through it will be:
(a) 0.92 A
(b) 2.9 A
(c) 9.2 A
(d) 92 A
Write down an expression for the resistance of a metallic wire in terms of the resistivity.
How does the resistance of a wire change when:
its length is tripled?
Give the law of combination of resistances in series.
What possible values of resultant resistance one can get by combining two resistances, one of value 2 ohm and the other 6 ohm?
If two resistors of 25 Ω and 15 Ω are joined together in series and then placed in parallel with a 40 Ω resistor, the effective resistance of the combination is :
(a) 0.1 Ω
(b) 10 Ω
(c) 20 Ω
(d)40 Ω
When do you say that the resistors are connected in this way? Draw a circuit diagram.
Define the term resistivity and state its S.I. unit. Which will have higher resistivity a conductor or an insulator.
State expression for Resistance connected in parallel.
Write an expression for calculating electrical power in terms of current and resistance.
Illustrate-combination of cells e.g., three cells, in parallel, explaining the combination briefly. Obtain an expression for current ‘i’ in the combination.
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then:
When a 4 Ω resistor is connected across the terminals of a 2 V battery, the number of coulombs passing through the resistor per second is:
