Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2026PhysicsChapterActual

In the given circuit, two batteries of EMFs 20 V and 8 V with internal resistances 2 and 1 respectively are connected as shown. What is the potential difference across the terminals of the 8 V battery?

Options

  1. A7 V
  2. B8 V
  3. C9 V
  4. D18 V

Correct answer

C. 9 V

Step-by-step solution

The two batteries are connected in opposition. The net EMF in the circuit is: E_ net = 20 - 8 = 12 V The total resistance of the series circuit is the sum of all external and internal resistances: R_ total = 4 + 1 + 5 + 2 = 12 The current in the circuit is: I = E_ net R_ total = 12 12 = 1 A The current flows clockwise, driven by the stronger 20 V battery, and enters the positive terminal of the 8 V battery. Thus, the 8 V battery is being charged. The potential difference across the terminals of a battery during cha

Practice Chapter on Quantrex Academy →

More from Chapter

A solid spherical body of radius R , density , and specific heat capacity s is initially at temperature T₀ . It is placed in a vacuum chamber at absolute zero and cools by emitting 2026A straight canal has motorboats departing from two terminals at opposite ends. The motorboats depart at regular intervals of T minutes in both directions and travel at a constant s 2026A wooden crate is released from rest at the top of a ramp inclined at 37^ to the horizontal. When the ramp is perfectly smooth, the crate reaches the bottom with a speed v . When t 2026A uniform horizontal beam of mass 6 kg and length L is hinged to a vertical wall at one end. The other end is supported by a light inextensible wire attached to the same wall, maki 2026A bullet P of mass 30 g moving with a speed of 200 m/s penetrates a target and comes to rest after travelling a distance of 10 cm inside it. Another bullet Q of mass 20 g moving wi 2026A small block of mass m is placed at the highest point of a smooth fixed sphere of radius R . It is given a horizontal initial speed v₁ such that it slides down the surface. The bl 2026A block of mass 2 kg is projected with an initial speed of 14 m/s on a rough horizontal surface. The coefficient of kinetic friction between the block and the surface is 0.2 . Afte 2026A uniform horizontal circular disc of mass M and radius R is rotating freely about a vertical axis passing through its center at an angular speed of 40 rpm . Two small blocks, each 2026 Full Chapter list All NEET PYQs