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प्रश्न
Fig. represents the circuit used for the verification of Ohm's law. Label the parts from A to F. state the function of each.
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उत्तर
Functions:
(A) Cell- It provides the potential difference in the circuit.
(B) Key- It serves as a switch in the circuit. It supplies or cuts off current as required.
(C) Ammeter- It measures the current in the circuit.
(D) Rheostat- It helps to change the resistance of the circuit without changing its voltage.
(E) Resistor- It provides a constant resistance in the circuit.
(F) Voltmeter- It measure the potential drop across the resistor.
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संबंधित प्रश्न
Ohm's law gives a relationship between:
(a) current and resistance
(b) resistance and potential difference
(c) potential difference and electric charge
(d) current and potential difference
The graph between V and I for a conductor is a straight line passing through the origin.
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Which of the following is an ohmic resistance?
Calculate the current flowing through a wire of resistance 5 Ω connected to a battery of potential difference 3 V.
Define the following:
Coulomb
What is meant by the drift speed of free electrons?
Explain the equivalent resistance of a series resistor network.
Suppose there is a circuit consisting of only resistances and batteries and we have to double (or increase it to n-times) all voltages and all resistances. Show that currents are unaltered. Do this for circuit of Example 3.7 in the NCERT Text Book for Class XII.
How is electric current related to the potential difference across the terminals of a conductor?
Draw a labelled circuit diagram to verify this relationship.
