Description : In the circuit shown in figure, the resistance R has a value that depends on the current. Specifically R is 20 `Omega` when `i` is zero and the amount
Last Answer : In the circuit shown in figure, the resistance R has a value that depends on the current. Specifically R is 20 `Omega` ... A B. `10A` C. 20 A D. `5A`
Description : Each resistor shown in the figure has a resistance of `10 Omega` and the battery has the emf 6 V. What will be the current supplied by the battery ?
Last Answer : Each resistor shown in the figure has a resistance of `10 Omega` and the battery has the emf 6 V. What will be the ... 2 A` C. `1.8 A` D. `0.3 A`
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 : 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 : 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 : When a resistance of `2 Omega` is placed across the terminals of a battery, the current is 0.5 A. When the resistance across the terminals of the batt
Last Answer : When a resistance of `2 Omega` is placed across the terminals of a battery, the current is 0 ... emf of the battery and also its internal resistance.
Description : In the given circuit diagram if each resistance is of `10 Omega`, then the current in arm AD will be
Last Answer : In the given circuit diagram if each resistance is of `10 Omega`, then the current in arm AD will be A. `(i)/(5)` ... )` C. `(3i)/(5)` D. `(4i)/(5)`
Description : A galvanometer having resistance of `50 Omega` requires a current of `100 Omega A` to given full scale deflection. How much resistance is required to
Last Answer : A galvanometer having resistance of `50 Omega` requires a current of `100 Omega A` to given full scale ... in series D. `10^(5)Omega` in parallel
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 : A galvanometer has a coil of resistance `100 Omega` and gives a full-scale deflection for `30 mA` current. If it is to work as a voltmeter of `30 V` r
Last Answer : A galvanometer has a coil of resistance `100 Omega` and gives a full-scale deflection for `30 mA` current. ... Omega` C. `1000 Omega` D. `1800 Omega`
Description : A DC ammeter has resistance `0.1 Omega` and its current ranges `0-100 A`. If the range is to be extended to `0-500`, then the following shunt resistan
Last Answer : A DC ammeter has resistance `0.1 Omega` and its current ranges `0-100 A`. If the range is to be extended ... Omega` C. `0.025 Omega` D. `0.25 Omega`
Description : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Last Answer : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Description : Six resistance each of value `r=5 Omega` are connected between points A, B and C as shown in figure. If `R_(1), R_(2)` and `R_(3)` are the net resista
Last Answer : Six resistance each of value `r=5 Omega` are connected between points A, B and C as shown in figure. If `R_(1), R_(2) ... 1:2:3` C. `5:4:3` D. `4:3:2`
Description : A 20 V battery of internal resistance `1 Omega` is connected to three coils of `12 Omega, 6 Omega` and `4 Omega` in parallel, a resistor of `5Omega` a
Last Answer : A 20 V battery of internal resistance `1 Omega` is connected to three coils of `12 ... and the terminal potential difference across each battery.
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 `5 Omega` resistor is connected in series with a parallel combination of n resistors of `6 Omega` each. The equivalent resistance is `7 Omega`. Find
Last Answer : A `5 Omega` resistor is connected in series with a parallel combination of n resistors of `6 Omega ... The equivalent resistance is `7 Omega`. Find n.
Description : How can the resistances of `2Omega, 3 Omega " and " 6 Omega` be connected to give an effective resistance of `4 Omega` ?
Last Answer : How can the resistances of `2Omega, 3 Omega " and " 6 Omega` be connected to give an effective resistance of `4 Omega` ?
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 : Calculate the resistance of a 2 m long nichrome wire of radius 0.321 mm. Resistivity of nichrome is `15xx10^(-6) Omega` m. If a potential difference o
Last Answer : Calculate the resistance of a 2 m long nichrome wire of radius 0.321 mm. Resistivity of nichrome is ` ... wire, what will be the current in the wire ?
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 : 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 : In the circuit shown in Fig. 4.63, the terminal voltage of the battery is 6.0 V. Find the current I through the `18 Omega` resistor.
Last Answer : In the circuit shown in Fig. 4.63, the terminal voltage of the battery is 6.0 V. Find the current I through the `18 Omega` resistor.
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 : 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 : 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 emf of a battery is 4.0 V and its internal resistance is `1.5 Omega`. Its potential difference is measured by a voltmeter of resistance `1000 Omeg
Last Answer : The emf of a battery is 4.0 V and its internal resistance is `1.5 Omega`. Its potential ... percentage error in the reading of emf shown by voltmeter.
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 reading of a voltmoter when a cell is connected to it is 2.2 V. When the terminals of the cell are connected to a resistance of `4 Omega`, the vol
Last Answer : The reading of a voltmoter when a cell is connected to it is 2.2 V. When the terminals of the ... to 2 V. Find the internal resistance of the cell.
Description : Determine the voltage drop across the resistance `R_(1)` in the circuit given in Fig. 4.55 with `epsilon=90 V, R_(1)=5 k Omega, R_(2)=5k Omega, R_(3)=
Last Answer : Determine the voltage drop across the resistance `R_(1)` in the circuit given in Fig. 4.55 with `epsilon=90 V, ... k Omega " and " R_(4)=10 k Omega`.
Description : In the circuit diagram shown in Fig. 4.53, a voltmeter reads 30 V when connected across `400 Omega` resistance. Calculate what the same voltmeter read
Last Answer : In the circuit diagram shown in Fig. 4.53, a voltmeter reads 30 V when connected across `400 ... when it is connected across `300 Omega` resistance.
Description : The resistance of a coil used in a platinum-resistance thermometer at `0^(@)C` is `3.00 Omega` and at `100^(@)C` is `3.75 Omega`. Its resistance at an
Last Answer : The resistance of a coil used in a platinum-resistance thermometer at `0^(@)C` is `3.00 Omega ... as `3.15 Omega`. Calculate the unknown temperature.
Description : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature it must be heated so that its resistance is doubled ? The tempera
Last Answer : The resistance of a silver wire at `0^(@)C " is " 1.25 Omega`. Upto what temperature ... temperature be same for all silver conductors of all shapes ?
Description : A standard coil marked `3 Omega` is found to have a true resistance of `3.115 Omega` at 300 K. Calculate the temperature at which marking is correct.
Last Answer : A standard coil marked `3 Omega` is found to have a true resistance of `3.115 Omega` at 300 K. Calculate the ... is `4.2xx10^(-3) .^(@)C^(-1)`.
Description : A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance of this thermometer is `5 Omega " at "
Last Answer : A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance ... for the platinum `=0.0036^(@)C`.
Description : The resistance of two conductors in series is `18 Omega` and the resistance becomes `4 Omega` when connected in parallel. Find the resistance of indiv
Last Answer : The resistance of two conductors in series is `18 Omega` and the resistance becomes `4 ... in parallel. Find the resistance of individual conductors.
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 : Given three resistances of `30 Omega` each. How can they be connected to given a total resistance of (i) `90 Omega (ii) 10 Omega (iii) 45 Omega` ?
Last Answer : Given three resistances of `30 Omega` each. How can they be connected to given a total resistance of (i) `90 Omega (ii) 10 Omega (iii) 45 Omega` ?
Description : (i) Three resistors `2 Omega, 4 Omega " and " 5 Omega` are comined in parallel. What is the total resistance of the combination ? (ii) If the comnbina
Last Answer : (i) Three resistors `2 Omega, 4 Omega " and " 5 Omega` are comined in parallel. What ... current through each resistor, and the total current drawn.
Description : Three resistors of `1 Omega, 2 Omega " and " 3 Omega` are combined in series. (i) What is the total resistance of the combination ? (ii) If the combin
Last Answer : Three resistors of `1 Omega, 2 Omega " and " 3 Omega` are combined in series. ( ... resistance, obtain the potential dropo across each resistor.
Description : The temperature coefficient of a resistance wire is `0.00 12.5^(@)C^(-1)`. At 300 K, its resistance is `1 Omega`. At what temperature the resistance o
Last Answer : The temperature coefficient of a resistance wire is `0.00 12.5^(@)C^(-1)`. At 300 K, its ... the resistance of the wire will be `2 Omega` ?
Description : A uniform wire is cut into four segments. Each segment is twice as long as the earlier segment. If the shortest segment has a resistance of `4 Omega`,
Last Answer : A uniform wire is cut into four segments. Each segment is twice as long as the earlier segment. ... Omega`, find the resistance of the original wire.
Description : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.
Last Answer : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.
Description : A potential difference of 10 V is applied across a conductor of resistance `1 k Omega`. Find the number of electrons flowing through the conductor in
Last Answer : A potential difference of 10 V is applied across a conductor of resistance `1 k Omega`. ... of electrons flowing through the conductor in 5 minutes.
Description : Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a wire 10 km long having resistance of `10
Last Answer : Given that resistivity of copper is `1.68xx10^(-8) Omega`m. Calculate the amount of copper required to draw a ... copper is `8.9xx10^(3) kg m^(-3)`.
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 : Two copper wires A and B of equal masses are taken. The length of A is double the length of B. If the resistance of wire A is `160 Omega `, then calcu
Last Answer : Two copper wires A and B of equal masses are taken. The length of A is double the length of ... Omega `, then calculate the resistance of the wire B.
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 conductivity wire of length 1.1 m and of diameter 0.14 mm is `30 Omega`. Calculate its resistivity.
Last Answer : The resistance of a conductivity wire of length 1.1 m and of diameter 0.14 mm is `30 Omega`. Calculate its resistivity.
Description : A voltmeter of range 2 V and resistance `300 Omega` cannot be converted into ammeter of range
Last Answer : A voltmeter of range 2 V and resistance `300 Omega` cannot be converted into ammeter of range A. `1 A` B. `1 mA` C. `100 mA` D. `10 mA`