QUIZ 1:Current Electricity(#freetestseries) - JEE MCQ

Find the equivalent resistance between A and B. Each resistor has same resistance R. 

Find the equivalent resistance. across the terminals of source of e.m.f. 24 V for the circuit shown in figure 

In the part of a circuit shown in figure, the potential  difference (V_G−V_H)between points G and H will be 

The length of a given cylindrical wire is increased by 100% Due to the consequent decrease in diameter, the change in the resistance of the wire will be

When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5×10^-4ms^-1 If the electron density in the wire is 8×10²⁸m^-3s, the resistivity of the material is close to

 Two capacitors C₁ and C₂ (C₁>C₂) are charged separately to same potential. Now they are allowed to discharge through similar resistors. Initial rate of discharging will be

For a cell, a graph is plotted between the potential Difference V across the terminals of the cell and the current I drawn from the cell (see figure). The emf and the internal resistance of the cell are E and r respectively. Then 

The effective resistance between points P and Q of the electrical circuit shown in the figure is 

Two conductors AB and CD are connected between two parallel resistors in such a way that no current flows through them. Then a wire is connected between E and F. 

 The potential difference across 8 ohm resistance is 48 volt as shown in the figure. What is the value of potential difference (in V) across A" and Y points? 

In order to quadruple the resistance of a uniform wire, a part of its length was uniformly stretched till the final length of the entire wire was 1.5 times the original length, the part of the wire was fraction equal to ______. 

 A battery of internal resistance 4Ω is connected to the network of resistances as shown. In order to give the maximum power to the network, the value of equivalent resistance (inΩ.) should be ______ R.