Arihant Physics by D.C Pandey
Two electric bulbs rated at 25 W, 220 V and 100 W, 220 V are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs now draw powers P1 and P2 respectively, then
05
Dec
Two electric bulbs rated at 25 W, 220 V and 100 W, 220 V are connected in series across a 220 V voltage source. If the 25 W and 100 W bulbs now draw powers P1 and P2 respectively, then 220 V and 100 W 220 V are connected in series across a 220 V [...]
The galvanometer deflection , when key K1 is closed but K2 is open equals θ0 (see figure ) On closing k2 also and adjusting R2 to 5Ω , the deflection in galvanometer becomes θ0/5. The resistance of the galvanometer is then , given by [Neglect the internal resistance of battery]:
05
Dec
The galvanometer deflection , when key K1 is closed but K2 is open equals θ0 (see figure ) On closing k2 also and adjusting R2 to 5Ω , the deflection in galvanometer becomes θ0/5. The resistance of the galvanometer is then , given by [Neglect the internal resistance of battery]: given by [Neglect the internal [...]
In the circuit shown, the potential difference between A and B is
05
Dec
In the circuit shown, the potential difference between A and B is In the circuit shown The potential difference between A and B is December 5, 2020 Category: Arihant Physics by D.C Pandey , Chapter 3 - Current Electricity , Volume 2 ,
In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40cm from A. If a 10Ω resistor is connected in series with R1, the null point shifts by 10cm. The resistance that should be connected in parallel with (R1 + 10)Ω such that the null point shifts back to its initial position is?
05
Dec
In the experimental set up of metre bridge shown in the figure, the null point is obtained at a distance of 40cm from A. If a 10Ω resistor is connected in series with R1, the null point shifts by 10cm. The resistance that should be connected in parallel with (R1 + 10)Ω such that the [...]
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In the experimental set up of metre bridge shown in the figure ,
the null point is obtained at a distance of 40cm from A. If a 10Ω resistor is connected in series with R1 ,
the null point shifts by 10cm. The resistance that should be connected in parallel with (R1 + 10)Ω such that the null point shifts back to its initial position is? ,
A galvanometer having a resistance of 20Ω and 30 divisible on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter up to 15 volt, is :
05
Dec
A galvanometer having a resistance of 20Ω and 30 divisible on both sides has figure of merit 0.005 ampere/division. The resistance that should be connected in series such that it can be used as a voltmeter up to 15 volt, is : A carbon resistance has a following color code. What is the value of [...]
In a Wheatstone bridge (see fig.), Resistances P and Q are approximately equal. When R=400Ω, the bridge is equal. When R=400Ω,the bridge is balanced. On inter-changing P and Q, the value of R, for balance, is 405 Ω. The value of X is close to :
05
Dec
In a Wheatstone bridge (see fig.), Resistances P and Q are approximately equal. When R=400Ω, the bridge is equal. When R=400Ω,the bridge is balanced. On inter-changing P and Q, the value of R, for balance, is 405 Ω. The value of X is close to : for balance In a Wheatstone bridge (see fig.) is [...]
Two equal resistances when connected in series to a battery ,consume electric power of 60 W .If these resistances are now connected in parallel combination to the same battery ,the electric power consumed will be :
05
Dec
Two equal resistances when connected in series to a battery ,consume electric power of 60 W .If these resistances are now connected in parallel combination to the same battery ,the electric power consumed will be : consume electric power of 60 W .If these resistances are now connected in parallel combination to the same battery [...]
The resistance of the meter bridge AB in given figure is 4 Ω .With a cell of emf ε=0.5V and rheostat resistance Rh=2Ω the null point is obtained at some point J is found for Rh=6Ω The emf ε2 is
05
Dec
The resistance of the meter bridge AB in given figure is 4 Ω .With a cell of emf ε=0.5V and rheostat resistance Rh=2Ω the null point is obtained at some point J is found for Rh=6Ω The emf ε2 is The resistance of the meter bridge AB in given figure is 4 Ω .With a [...]
The actual value of resistance R, shown in the figure is 30Ω. This is measured in an experiment as shown using the standard formula R=V/I, where V and I are the readings of the voltmeter and ammeter, respectively. If the measured value of R is 5% less, then the internal resistance of the voltmeter is
05
Dec
The actual value of resistance R, shown in the figure is 30Ω. This is measured in an experiment as shown using the standard formula R=V/I, where V and I are the readings of the voltmeter and ammeter, respectively. If the measured value of R is 5% less, then the internal resistance of the voltmeter is [...]
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respectively. If the measured value of R is 5% less ,
shown in the figure is 30Ω. This is measured in an experiment as shown using the standard formula R=V/I ,
The actual value of resistance R ,
then the internal resistance of the voltmeter is ,
where V and I are the readings of the voltmeter and ammeter ,
A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is
05
Dec
A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an ideal power supply of 11 V is connected across it is A current of 2 mA was passed through an unknown resistor which dissipated a power of 4.4 W. Dissipated power when an [...]