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` and a reversed battery (emf=8 V and internal resistance `=2 Omega`), as shown in Fig. 4.69. Calculate the current in each resistor and the terminal potential difference across each battery.
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A battery of emf 6V internal resistance 5`Omega` is joined in parallel with another cell of emf of 10V and internal resistance `1Omega` and the combin
Correct Answer - `6/11 A through 6-V battery in opposition to its emf and `(1)3/11` A through 10-V battery in direction of the emf
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A battery of emf 6 volts and internal resistance `1Omega` is connected in parallel to another battery of emf 8V and internal resistance `2Omega`. The
Correct Answer - `5/8`A
2 Answers 1 views
A cheap voltmeter with an internal resistance of `30Omega` is connected to the terminals of a battery whose internal resistance is `5Omega` and true e
Correct Answer - `1.29 V`
2 Answers 1 views
A 600`Omega` resistor and a 400`Omega` resistor are connected in series across a 90-volt line. A voltmeter acros the `600Omega` resistor reads 45V. Wh
Correct Answer - `1200 Omega,30 v`
2 Answers 1 views
A solenoid having a resistance of `5Omega` and self-inductance of 4H is connected to a battery of emf 10V and negligible resistance. After how long wi
Correct Answer - 0.555s
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A wire of resistance `5Omega` is connected to a battery of emf 2V and internal resistance `1Omega` (a) How much energy is transferred from the chemica
Correct Answer - 80J, 66.7j, the rest is lost as heat in internal of the battery.
2 Answers 1 views
A dynamo of emf `varepsilon_(1)=120V` and internal resistance `r=0.5Omega`, and a storage battery of `varepsilon_(2)=110V` are connected to an extenal
Correct Answer - `5.5Omega, if R gt 5.5 Omega "the battery will be changed and if" R lt 5.5Omega` the battery will be discharged.
2 Answers 1 views
vii) A cell of emf \( 1.1 V \) and internal resistance \( r \) is connected across an external resistor of resistance \( R=10 \). The potential difference across the resistor is a) \( 0.1 V \) b) \( 0.9 V \) c) \( 1.0 V \) d) \( 1.1 V \)
Given E = 1.1 V r = r R = 10 r Potential difference across the resistor = IR = (E/R+r) R = (1.1/10r+r) 10 r \(=\frac{1.1\times10\,r}{11\,r\times10}\) = 11/11 = 1 volt option (c) is correct.
2 Answers 2 views
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
Correct Answer - `1.25xx10^(18)`
2 Answers 1 views
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
Correct Answer - `5 Omega`
2 Answers 1 views