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question_answer1) In copper, each copper atom releases one electron. If a current of 1.1 A is flowing in the copper wire of uniform cross-sectional area of diameter 1 mm, find drift velocity (in mm) of electrons (Density of copper =\[9\times {{10}^{3}}kg/{{m}^{3}}\], Atomic weight of copper\[=63\])
question_answer2) A network of nine conductors connects six points A, B, C, D, E and F as shown below. The digits denote resistances in\[\Omega \]. Find the equivalent resistance between B and C-
question_answer3) Calculate the potential difference between points A and B. (in V)
question_answer4) For driving a current of 3 ampere for 5 minutes in an electrical circuit, 900 joule of work is to be done. Find the emf of the source in the circuit. (in V)
question_answer5) In the circuit shown in figure the value of R (in\[\Omega \]) is-
question_answer6) In the circuit, the value of R (in \[\Omega \]) is so chosen that thermal power generated in it is maximum, then value of R is ?
question_answer7) A potentiometer wire AB is 100 cm long and has a total resistance of 10 ohm. If the galvanometer shows zero deflection at the position C, then find the value of unknown resistance R. (in \[\Omega \])
question_answer8) The emf (in V) of the battery shown in the figure is given by-
question_answer9) In the given figure the ratio of current in \[8\Omega \] and \[3\Omega \] will be-
question_answer10) An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10A the value of the required shunt (in \[\Omega \]) is-
question_answer11) The total current (in A) supplied to the circuit by the battery is-
question_answer12) The resistance of the series combination of two resistance is S. When they are joined in parallel the total resistance is P. If \[S=n\text{ }P\]then minimum possible value of n is ?
question_answer13) An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of the wires are in the ratio of \[4/3\]and\[2/3\], then the ratio of the currents passing through the wires will be-
question_answer14) In the circuit shown, the cell is ideal, with\[emf=15\text{ }V\]. Each resistance is of\[3\Omega \]. The potential difference (in V) across the capacitor is-
question_answer15) The potential difference across the\[100\Omega \] resistance in the following circuit is measured by a voltmeter of\[900\Omega \]resistance. The percentage error made in reading the potential difference is ?
question_answer16) A voltmeter of resistance \[{{R}_{V}}\] and an ammeter of resistance \[{{R}_{A}}\]are connected in series across a battery of emf E and of negligible internal resistance. When a resistance R is connected in parallel to voltmeter, reading of ammeter increases to three times while that of voltmeter reduces to one-third. If \[{{R}_{v}}=\lambda \] \[{{R}_{A}}\]. Find value of\[\lambda \].
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