Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEETPhysicsCurrent Electricity

A storage battery of emf 6 V and internal resistance 1 is being charged by a 30 V DC supply using a series resistor of 5 . What is the terminal potential difference across the battery during the charging process?

Options

  1. A2 V
  2. B6 V
  3. C10 V
  4. D34 V

Correct answer

C. 10 V

Step-by-step solution

During charging, the DC supply opposes the emf of the battery. The net emf in the circuit is: E_ net = V_ supply - E = 30 - 6 = 24 V The total resistance of the circuit is the sum of the series resistor and the internal resistance of the battery: R_ total = R + r = 5 + 1 = 6 The charging current i in the circuit is: i = E_ net R_ total = 24 6 = 4 A When a battery is being charged, the current enters its positive terminal. The terminal potential difference V across the battery is given by: V = E + ir V = 6 + (4 1) =

Practice Current Electricity on Quantrex Academy →

More from Current Electricity

A potentiometer wire of 400 cm length has a resistance of 20 . It is connected in series with a resistance of 15 and a accumulator of EMF 6 V (negligible internal resistance). The 2026In the following figure current I equal to 2026The range of voltmeter is 10 V and its resistance is 50 . To convert it to a voltmeter of range 15 V , how much resistance is to be added? 2026When a galvanometer is shunted with a 2 resistance, the deflection is reduced to one-fourth. If the galvanometer is further shunted with a 1 resistance, the further reduction in de 2026A galvanometer can be converted into a voltmeter of certain range by connecting a resistance of 990 in series with it. When the resistance of 480 is connected in series, the range 2026A resistance is to be measured using a meter bridge; the student chooses the standard resistance R to be 100 . The student finds the null point at l₁=16 cm. To get the null point n 2026Which of the following statements is FALSE? A. In a balanced Wheatstone bridge, if the cell and the galvanometer are exchanged, the null point is disturbed. B. A rheostat can be us 2026A potentiometer wire has length 4 m and resistance 8 . The resistance that must be connected in series with the wire and the driving battery of e.m.f. 2 V, so as to get a potential 2026 Full Current Electricity list All NEET PYQs