A potentiometer wire of length `100 cm` having a resistance of `10 Omega` is connected in series with a resistance `R` and a cell of emf `2V` of negli

1 Answer

Answer :

A potentiometer wire of length `100 cm` having a resistance of `10 Omega` is connected in series with a ... Omega` C. `790 Omega` D. `840 Omega`

Related questions

Description : AB is a potentiometer wire of length 100 cm and its resistance is `10Omega`. It is connected in series with a resistance R = 40 `Omega` and a battery

Last Answer : AB is a potentiometer wire of length 100 cm and its resistance is `10Omega`. It is connected in series with a ... `1.6V` C. `0.08V` D. `0.16V`

Description : Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If `0.2 mV/cm` is the potential gradient, the

Last Answer : Potentiometer wire of length `1 m` is connected in series with `490 Omega` resistance and `2 V` battery. If ... 7.9Omega` C. `5.9Omega` D. `6.9Omega`

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 : In given figure, the potentiometer wire AB has a resistance of `5 Omega` and length 10 m . The balancing length AM for the emf of 0.4 V is

Last Answer : In given figure, the potentiometer wire AB has a resistance of `5 Omega` and length 10 m . The balancing length AM for ... B. 4 m C. `0.8` m D. 8 m

Description : A potentiometer wire has length `4 m` and resistance `8 Omega`. The resistance that must be connected in series with the wire and an accumulator of e.

Last Answer : A potentiometer wire has length `4 m` and resistance `8 Omega`. The resistance that must be connected in ... Omega` C. `44 Omega` D. `48 Omega`

Description : A potentiometer wire of length 10 m and resistance `10 Omega` per meter is connected in serice with a resistance box and a 2 volt battery. If a potent

Last Answer : A potentiometer wire of length 10 m and resistance `10 Omega` per meter is connected in serice with a ... Omega` C. `190 Omega` D. `90 Omega`

Description : A resistance of `4 Omega` and a wire of length 5 meters and resistance `5 Omega` are joined in series and connected to a cell of e.m.f. `10 V` and int

Last Answer : A resistance of `4 Omega` and a wire of length 5 meters and resistance `5 Omega` are joined in series and connected ... `3.0V` C. `0.67V` D. `1.33V`

Description : An electron in potentiometer experiences a force `2.4xx10^(-19)N`. The length of potentiometer wire is 6m. The emf of the battery connected across the

Last Answer : An electron in potentiometer experiences a force `2.4xx10^(-19)N`. The length of potentiometer wire is 6m. The emf of ... 6 V B. 9 V C. 12 V D. 15 V

Description : A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected in series first to support

Last Answer : A potentiometer wire is `100 cm` long hand a constant potential difference is maintained across it. Two cells are connected ... C. `3 : 2` D. `5 : 1`

Description : A d.c. potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf0fthe test cell is  A)1.00V B)1.34V C)1.50V D)1.70V 

Last Answer : A d.c. potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf0fthe test cell is 1.34V

Description : A 2 V battery, a `990Omega` resistor and a potentiometer of 2 m length, all are connected in series of the resistance of potentiometer wire is `10Omeg

Last Answer : A 2 V battery, a `990Omega` resistor and a potentiometer of 2 m length, all are connected in series of the resistance ... 0.01Vm^(-1)` D. `0.1Vm^(-1)`

Description : A `1 Omega` resistance in series with an ammeter is balanced by 25 cm of potentiometer by 50 cm. The ammeter shows a reding of `1.5 A`. Then, the erro

Last Answer : A `1 Omega` resistance in series with an ammeter is balanced by 25 cm of potentiometer by 50 cm. The ammeter shows a ... B. 3A C. `1.3 A` D. `0.3A`

Description : 10 cells, each of internal resistance `0.5 Omega` and 1.2 V emf are connected (a) all in series and (b) all in paralle. Calculate the current sent in

Last Answer : 10 cells, each of internal resistance `0.5 Omega` and 1.2 V emf are connected (a) all in ... each case through a wire of resistance `0.8 Omega`.

Description : Three identical, each of emf 2 V and internal resistance `0.2 Omega` are connected in series to an external resistor of `7.4 Omega`. Calculate the cur

Last Answer : Three identical, each of emf 2 V and internal resistance `0.2 Omega` are connected in series to ... 7.4 Omega`. Calculate the current in the circuit.

Description : The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E volt. It is employed to measure the e.m.f. of a battery wh

Last Answer : The length of a wire of a potentiometer is 100 cm, and the e.m.f. of its standard cell is E ... current in the potentiometer wire D. `(30E)/(100)`

Description : In potentiometer experiment, a cell of emf `1.25 V` gives balancing length of 30 cm. If the cell is replaced by another cell, then balancing length is

Last Answer : In potentiometer experiment, a cell of emf `1.25 V` gives balancing length of 30 cm. If the cell is replaced by another ... . `~=1.47 V` D. `~=1.37 V`

Description : When a resistance of 100`Omega` is connected in series with a galvanometer of resistance R, then its range is V. To double its range, a resistance of

Last Answer : When a resistance of 100`Omega` is connected in series with a galvanometer of resistance R, then its range ... 800`Omega` C. 900`Omega` D. 100`Omega`

Description : A `100 V` voltmeter of internal resistance `20 k Omega` in series with a high resistance `R` is connected to a `110 V` line. The voltmeter reads `5 V`

Last Answer : A `100 V` voltmeter of internal resistance `20 k Omega` in series with a high resistance `R` is ... B. `315kOmega` C. `420kOmega` D. `440kOmega`

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 : 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) g

Last Answer : Two cells, having the same emf, are connected in series through an external resistance `R`. Cells have internal resistance ... D. `(r_(1)+r_(2))/(2)`

Description : In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across `60 cm` of the potentiometer wire. If the cell is

Last Answer : In a potentiometer experiment, the galvanometer shows no deflection when a cell is connected across `60 cm` of ... ` C. `1.2Omega` D. `1.5Omega`

Description : Calculate the conductivity of a wire of length 2 m, area of cross-sectionl `2 cm^(2)` and resistance `10^(-4) Omega`.

Last Answer : Calculate the conductivity of a wire of length 2 m, area of cross-sectionl `2 cm^(2)` and resistance `10^(-4) Omega`.

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 : 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 : 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 : A circuit consists of three bateries of emf `E_(1) = 1V, E_(2)=2V` and `E_(3)=3V` and internal resistance `1Omega, 2Omega` and `1Omega` respectively w

Last Answer : A circuit consists of three bateries of emf `E_(1) = 1V, E_(2)=2V` and `E_(3)=3V` and internal resistance `1Omega, ... ` B. `2.0V` C. `2.2V` D. `3.0V`

Description : Three identical cells each of emf 2 V and unknown internal resistance are connected in parallel. This combination is connected to a `5 Omega` resistor

Last Answer : Three identical cells each of emf 2 V and unknown internal resistance are connected in parallel. ... what is the internal resistance of each cell ?

Description : A battery of emf 2 V and internal resistance `0.5 Omega` is connected across a resistance of `9.5 Omega`. How many electrons pass through a cross-sect

Last Answer : A battery of emf 2 V and internal resistance `0.5 Omega` is connected across a resistance of `9. ... a cross-section of the resistance in 1 second ?

Description : The potential differnce between the terminals of a battery of emf 6.0 V and internal resistance `1 Omega` drops to 5.8 V when connected across an exte

Last Answer : The potential differnce between the terminals of a battery of emf 6.0 V and internal resistance ... resistor . Find the resistance of the external res

Description : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Last Answer : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Description : Two electric bulbs rated 50 W and 100 W are glowing at full powr, when used in parallel with a battery of emf 120 V and internal resistance 10 `Omega`

Last Answer : Two electric bulbs rated 50 W and 100 W are glowing at full powr, when used in parallel with a battery of emf 120 V ... power, is A. 6 B. 4 C. 2 D. 8

Description : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected between the respective lines and the neutral. Calculate the current in the neutral wire?\[Z_{R}=20 \angle 0^{\circ} ... Z_{Y}=20 \angle 35^{\circ} \Omega, Z_{B}=20 \angle-55^{\circ} \Omega\](10M)

Last Answer : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected ... =20 \angle-55^{\circ} \Omega \] (10M)

Description : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected between the respective lines and the neutral. Calculate the current in the neutral wire?\[Z_{R}=20 \angle 0^{\circ} ... Z_{Y}=20 \angle 35^{\circ} \Omega, Z_{B}=20 \angle-55^{\circ} \Omega\](10M)

Last Answer : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected ... =20 \angle-55^{\circ} \Omega \] (10M)

Description : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected between the respective lines and the neutral. Calculate the current in the neutral wire?\[Z_{R}=20 \angle 0^{\circ} ... Z_{Y}=20 \angle 35^{\circ} \Omega, Z_{B}=20 \angle-55^{\circ} \Omega\](10M)

Last Answer : 4. A three-phase, four-wire system having \( 250 V \) line-to-neutral has the following loads connected ... =20 \angle-55^{\circ} \Omega \] (10M)

Description : The equivalent resistance of two resistor connected in series is `6 Omega` and their equivalent resistance is `(4)/(3)Omega`. What are the values of r

Last Answer : The equivalent resistance of two resistor connected in series is `6 Omega` and their equivalent resistance is `(4 ... , 2 Omega` D. `6 Omega, 2 Omega`

Description : Two cells of emf of 1.5 V and 2.0 V having internal resistances of `1 Omega` and `2 Omega`, respectively are connected in parallel so as to send curre

Last Answer : Two cells of emf of 1.5 V and 2.0 V having internal resistances of `1 Omega` and `2 Omega` ... of `5 Omega`. Find the current in the external circuit.

Description : Four cells, each of emf E and internal resistance r, are connected in series across an external resistance reverse. Then, the current in the external

Last Answer : Four cells, each of emf E and internal resistance r, are connected in series across an external resistance reverse. Then, ... (3r+R)` D. `(2E)/(3r+R)`

Description : There are n cells, each of emf E and internal resistance r, connected in series with an external resistance R. One of the cells is wrongly connected,

Last Answer : There are n cells, each of emf E and internal resistance r, connected in series with an external resistance R. One of the ... D. `((n-2)E)/((n-2)r+R)`

Description : The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)`. If 0.2 A current is flowing throug

Last Answer : The resistivity of a potentiometer wire is `40xx10^(-8)Omega-m` and its area of cross section is `8xx10^(-6)m^(2)` ... . `3.2xx10^(-2)V//m` D. `1V//m`

Description : A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) Omega`m. The diameter of each turn is 3 cm. What is the maximum v

Last Answer : A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) ... the maximum value of resistance that it can introduce ?

Description : In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of `2Omega`, the balancing length

Last Answer : In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a ... Omega` C. `4 Omega` D. `2 Omega`

Description : How would you arrange 64 similar cells each having an emf of 2.0 V and internal resistance `2 Omega` so as to send maximum current through an external

Last Answer : How would you arrange 64 similar cells each having an emf of 2.0 V and internal resistance ` ... current through an external resistance of `8 Omega`.

Description : Find the minimum number of cells required to produce an electric current of 1.5 A through a resistance of `30 Omega`. Given that the emf of each cell

Last Answer : Find the minimum number of cells required to produce an electric current of 1.5 A through a resistance ... .5 V and internal resistance `1.0 Omega`.

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 : What length of a wire of diameter 0.46 mm and specific resistance `50xx10^(-6) Omega`m would be required to make a coil of resistance `10 Omega` ?

Last Answer : What length of a wire of diameter 0.46 mm and specific resistance `50xx10^(-6) Omega`m would be required to make a coil of resistance `10 Omega` ?

Description : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original length. Calculate its new resistance (resistivity and density o

Last Answer : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original ... (resistivity and density of the material remain uncharged).

Description : The resistance of a wire is `10 Omega`. Its length is increased by `10%` by stretching. The new resistance will now be

Last Answer : The resistance of a wire is `10 Omega`. Its length is increased by `10%` by stretching. The new resistance ... B. `1.2Omega` C. `13Omega` D. `11Omega`

Description : A uniform wire which connected in parallel with the 2 m long wire, will give a resistance of `2.0 Omega`.

Last Answer : A uniform wire which connected in parallel with the 2 m long wire, will give a resistance of `2.0 Omega`.

Description : When 10 cells in series are connected to the ends of a resistance of `59 Omega`, the current is found to be 0.25 A, but when the same cells after bein

Last Answer : When 10 cells in series are connected to the ends of a resistance of `59 Omega`, the ... Calculate the internal resistance and emf of each cell.

Description : A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a resistance of `10 ohm`. If a lengt

Last Answer : A potentiometer having the potential gradient of `2 mV//cm` is used to measure the difference of potential across a ... `) A. 1 B. 2 C. 5 D. 10