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Electric field and current density have

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Two bulbs of `40W and 60W` are connected to `220V` line, the ratio of resistance will

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The heat produced by 100W heater in 2 min is equal

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Current through the `5 Omega` resistor

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A battery of emf E has an internal resistance r. A variable resistance R is connected to the terminals of the battery. A current `i` is drawn from the battery. V is the terminal potential difference. If R alone is gradually reduced to zero, which of the following best describes `i and

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A cell of emf (E) and internal resistance r is connected across a variable external resistance R . The graph of terminal potential difference V as a function of R

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In the electric circuit shown, each cell has an emf of `2 V` and internal resistance is `1Omega` . The external resistance is `2Omega`. The value of the current `I` is (in

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Consider first two cells in series as shown in figure. The potential difference between the terminals A and C of the combination

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In the circuit shown in figure, `E_1=10V, E_2=4 V , r_1 = r_2 = 1Omega and R = 2Omega` Find the potential difference across battery 1 and battery

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Under what conditions current passing through the resistance R can be increased by short circuiting the battery of emf `E_2` ? The internal resistances of the two batteries are `r_1 and r_2`,

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12 cells, each of emf `1.5 V` and internal resistance of `0.5 Omega`, are arranged in `m` rows each containing `n` cells connected in series, as shown in the figure.Calculate the values of `n and m` for which this combination would send maximum current through an external resistance of `1.5

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According to Kirchhoff’s current law as applied to a junction in a network of

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Five conductors are meeting at a point `x` as shown in the figure. What is the value of current in fifth

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The currents `i_1 and i_2` through the resistors `R_1(=10 Omega) and R_2 (= 30 Omega)` in the circuit diagram with `E_1= 3 V, E_2 = 3 V and E_3 = 2 V` are

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The algebraic sum of voltages around any closed path in a network is equal

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The potential difference `(V_A - V_B)` between the points A and B in the given figure

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If `2A` current is flowing in the shown circuit, then potential difference `(V_B - V_D)` in balanced condition

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In a Wheatstone bridge circuit, `P=7 Omega, Q= 8 Omega, R = 12 Omega and S = 7 Omega`. Find the additional resistance to be used in series with `S` , so that the bridge is

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A meter bridge is set up as shown in figure, to determine an unknown resistance `X` using a standard `10 Omega` resistor. The galvanometer shows null point when tapping key is at `52 cm` mark. The end-corrections are `1 cm and 2 cm` respectively for the ends A and B. The determined value of `X`

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The figure below shows a `2.0 V` potentiometer used for the determination of internal resistance of a `2.5 V` cell. The balance point of the cell in the open circuit is 75 cm. When a resistor of `10 Omega` is used in the external circuit of the cell, the balance point shifts to 65 cm length of potentiometer wire. The internal resistance of the cell

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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