Answer to Question #61525 in Physics for hi

Question

19 Which of the following is NOT true about a rheostat?
It is a constant current instrument
It is a resistor with moving contact
It is used for varying the current in a circuit
It is used for varying the resistance in a circuit
20 For a metallic conductor, Ohm's law holds provided
potential difference varies
current remains constant
temperature remains constant
potential difference remains constant

Answer 1

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