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Capacitance of a Random Conductor

If the resist...

Question

If the resistance of an electric component remains constant while the potential difference across two ends of the component decreases to half of its former value, what change will occur in the current through it?

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Solution

We know that for a given resistance, $V \propto I$ . So when the voltage becomes half, current will also become half of the former value.

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Q. Question 3
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?

Q. Keeping the resistance constant, potential difference across the ends of the component is decreased to half of the former value. What change will occur with current?

Q. The current flowing through a resistor connected in an electrical circuit and the potential difference developed across its ends are shown in the given diagrams
The value of resistance of the resistor in ohms is___

Q. (a) Name a device which helps to maintain a potential difference across the ends of a conductor.
(b) What is meant by saying that the potential difference between two points is 1 V?
(c) Define Ohm's law. Write an expression for it.
(d) What is the unit of resistance?
(e) When the potential difference between the terminals of an electric heater is 110 V, a current of 5 A flows through it. What current will flow through the heater if the potential difference is increased to 220 V? What is the resistance of heater?

Q. The current flowing through a resistor connected in an electric circuit and the potential difference applied across its ends are shown in the figures below:

The value of the resistance of the resistor is :
(1) 10 Ω
(2) 15 Ω
(3) 20 Ω
(4) 25 Ω

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Capacitance of a Random Conductor

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