The internal resistance of a cell is Directly proportional to the electrolyte concentration, Inversely proportional to the electrodes plate area, Determined by the nature of electrolyte used.
Description : Define the following terms as referred to battery. a) E.M.F b) Internal resistance c) Ah efficiency d) WAh efficiency
Last Answer : a) E.M.F : The electromotive force of a battery is defined as the energy spent or the work done in taking a unit positive charge around the complete circuit of the battery i.e., in ... input required to restore the initial state of charge, under specified conditions, is called Watt-hr efficiency.
Description : Five cells, each with an e.m.f. of 2V and internal resistance of 0.5Ω are connected in series. The resulting battery will have
Last Answer : Five cells, each with an e.m.f. of 2V and internal resistance of 0.5Ω are connected in series. The resulting battery will have An e.m.f. of 10V and an internal resistance of 2.5 Ω
Description : An ideal current source is one whose internal resistance is (A) Very high (B) zero (C) infinite (D) very low
Last Answer : An ideal current source is one whose internal resistance is infinite
Description : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
Description : The internal resistance of an ideal voltage source is : (A) Zero (B) Infinity (C) A finite value (D) None of the above
Last Answer : The internal resistance of an ideal voltage source is Zero
Last Answer : The internal resistance of the voltmeter must be very high in order to have Minimum current through the meter.
Description : A cell of emf E and internal resistance r is connected in series with an external resistance nr. Than what will be the ratio of the terminal potential
Last Answer : A cell of emf E and internal resistance r is connected in series with an external resistance nr. Than what will be the ... /(n + 1)` D. `(n + 1)/n`
Description : The internal resistance of a `2.1 V` cell which gives a current `0.2 A` through a resistance of `10 Omega`
Last Answer : The internal resistance of a `2.1 V` cell which gives a current `0.2 A` through a resistance of `10 Omega` A ... Omega` C. `0.8 Omega` D. `1.0 Omega`
Description : The emf of a cell E is 15 V as shown in the figure with an internal resistance of `0.5Omega`. Then the value of the current drawn from the cell is
Last Answer : The emf of a cell E is 15 V as shown in the figure with an internal resistance of `0.5Omega`. Then the value of ... A. `3A` B. `2A` C. `5A` D. `1A`
Description : Four identical cells of emf `epsilon` and internal resistance r are to be connected in series. Suppose, if one of the cell is connected wrongly, then
Last Answer : Four identical cells of emf `epsilon` and internal resistance r are to be connected in series. Suppose, if one of ... and 4r C. 2E and 2r D. 4E and 2r
Description : A wire of length 100 cm is connected to a cell of emf 2 V and negligible internal resistance. The resistance of the wire is `3 Omega`. The additional
Last Answer : A wire of length 100 cm is connected to a cell of emf 2 V and negligible internal resistance. The ... B. `47Omega` C. `57Omega` D. `35Omega`
Description : A cell supplies a current `i_(1)` trhough a resistnace `R_(1)` and a current `i_(2)` through a resistance `R_(2)`. The internal resistance of this cel
Last Answer : A cell supplies a current `i_(1)` trhough a resistnace `R_(1)` and a current `i_(2)` through a resistance `R_(2 ... ))/(i_(1)-i_(2)))sqrt(R_(1)R_(2))`
Description : A voltmeter of resistance `998 Omega` is connected across a cell of emf 2 V and internal resistance `2 Omega`. Find the p.d. across the voltmeter, tha
Last Answer : A voltmeter of resistance `998 Omega` is connected across a cell of emf 2 V and internal resistance `2 Omega`. Find the ... B. `3.5 V` C. 5 V D. 6 V
Description : An ammeter and a voltmeter of resistance `R` connected in seires to an electric cell of negligible internal resistance. Their readings are `A` and `V`
Last Answer : An ammeter and a voltmeter of resistance `R` connected in seires to an electric cell of negligible ... increase D. A will increase and V will decrease
Description : The maximum power dissipated in an external resistance R, when connected to a cell of emf E and internal resistance r, will be
Last Answer : The maximum power dissipated in an external resistance R, when connected to a cell of emf E and internal resistance r, ... /(3r)` D. `(E^(2))/(4r)`
Description : If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as
Last Answer : If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given ... /R)` D. `V=E//(1+R//r)`
Description : A neon flashlight cell with an emf of 1.5V gives a current of 15A when connected directly to an ammeter of resistance 0.04?. Internal resistance of the cell is a. 0.0004? b. 0.06? c. 0.10? d. 0.13?
Last Answer : b. 0.06?
Description : Which one of the following is the advantage of connecting two dry cells in parallel instead of in series? Is it because the parallel arrangement: w) gives twice the EMF of one dry cell x) has no ... circuit half as fast as would a single cell z) has half the internal resistance of a single cell
Last Answer : ANSWER: Z -- HAS HALF THE INTERNAL RESISTANCE OF A SINGLE CELL
Description : The terminal voltage of a cell supplying energy to a circuit is usually less than its emf because of the cell's w) size x) internal resistance y) mass z) energy
Last Answer : ANSWER: X -- INTERNAL RESISTANCE