You are given a low resistance `R_1`, a high resistance `R_2` and a moving coil galvanometer. Suggest how would you use these to have an instrument that will be able to measure potential difference?

You are given a low resistance R_1 , a high resistance R_2 and a moving coil galvanometer. Suggest how would you use these to have an instrument that will be able to measure current?

A battery of e.m.f 12 V supplies a current through a oil of resistance 48 ohm. The internal resistance of the battery is 1.2 ohms. A voltmeter of resistance 72 oohm is sued to measure the potential difference across the coil. What value would it show?

You are given n resistors each of resistance r .These are first connected to get minimum resistance .In the secoind case these are again connected differently to get maximum possible resistance. Compute the ratio between the minimum and maximum value of resistance so obtained.

Two cells of e.m.f. of 1.6 V and 2.4 V have internal resistance 2 and 4 respectively. The two resistance wires positive poles are connected to resistance of 6 and negative poles connected to 8 ohm. If another wire of 10 is connected between the mid-points of these wires, what is the potential difference across it.

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : The resistors are connected in parallel, when resistance in the circuit is to be decreased. Reason : On connecting the resistors in parallel, the potential difference across a resistor is proportional to its resistance.

If the current sensitivity of a moving coil galvanometer is increased by 20%, it resistance also increases by 1.5 times. How will the voltage sensitivity of the galvanometer be affected?

Two cells, having the same emf, are connected in series through an external resistance R. Cells have internal resistance r_(1) and r_(2) (r_(1) gt r_(2)) respectively. When the circuit is closed, the potentail difference across the first cell is zero the value of R shown in the figure

You are given n-resistors each of resistance r. These are first connected to get minimum possible resistance. In second case again connected to the maximum possible resistance. Compare the ratio between the minimum and maximum value of resistance so obtained?

Two cells of the same e.m.f. E but internal resistance r_1 and r_2 are connected in series to an external resistor R (fig. EP 3.25). What should be the value of R so that the potential difference across the terminals of the first cell becomes zero?