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question_answer1) Directions (Q. No.1 to 13): In the following questions, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as. Assertion (A): Fuse wire has high resistance and low melting point. Reason (R): Fuse wire is for small current flow only.
question_answer2) Assertion (A): Electric appliance with metal body has three electrical connections. But an electrical bulb has two electrical connection. Reason (R): Three pin connection reduces chances of electrical shocks.
question_answer3) Assertion (A): The resistance of superconductor is zero. Reason (R): Super conductors are used for electrical power transmission.
question_answer4) Assertion (A): The same amount of current flows through the filament and line wire. But more heat is produced in filament. Reason (R): Filament is made of material having high resistance and high melting point.
question_answer5) Assertion (A): Power rating of resistance is not so important when used in a circuit. Reason (R): The resistance value changes with temperature.
question_answer6) Assertion (A): Kirchhoff's junction rule is applicable for any number of lines meeting at a point in an electrical circuit. Reason (R): When there is a flow of steady current, then there is no accumulation of charge at the junction.
question_answer7) Assertion (A): Kirchhoff's voltage law indicates that the electric field is conservative. Reason (R): Potential difference between two points in a circuit does not depend on the path.
question_answer8) Assertion (A): In balanced condition, if the galvanometer and the voltage source is interchanged, the balanced condition remains same. Reason (R): The balanced condition of Wheatstone bridge does not depend on the value of the resistances.
question_answer9) Assertion (A): In balanced condition of a Wheatstone bridge, there is no current flow through the galvanometer Reason (R): The potential of point B and D are same.
question_answer10) Assertion (A): A high resistance is connected in series with the galvanometer of Meter Bridge. Reason (R): As resistance increases, the current also increases.
question_answer11) Assertion (A): Meter bridge wire is generally made of Constantan. Reason (R): Constantan has a very low temperature coefficient of resistance.
question_answer12) Assertion (A): The balancing point of a meter bridge is obtained at L = 40 cm. When the area of cross-section of the wire of is doubled, the balancing point shifts to L = 60 cm. Reason (R): Resistance of wire is directly proportional to its area of cross - section.
question_answer13) Assertion (A): Potentiometer is used to measure the e.m.f. of a cell. Reason (R): Potentiometer is preferred over voltmeter to measure the e.m.f. a cell since it does not draw any net current from the cell
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