Home
Class 12
PHYSICS
A battery or emf 10 V and internal resis...

A battery or emf 10 V and internal resistance 3`Omega` is connected to a resistot. If the current in the circuit is 0.5 A, what is the resistance of the resistor ?

A

`13 Omega`

B

`15 Omega`

C

`17 Omega`

D

`19 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
`17 Omega`

Current I =`(E)/( R + r) `
`therefore R + r = (E)/(I) = (10)/(0.5) `
`therefore R + 3 = 20 Omega`
`therefore R = 17 Omega`
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN BOARD EXAM AND GUJCET)|23 Videos

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN CBSE-PMT, AIPMT, NEET)|17 Videos

  • BOARD'S QUESTION PAPER MARCH-2020

    KUMAR PRAKASHAN|Exercise PART-B SECTION -C|4 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in GUJCET/Board Exam)|1 Videos

Similar Questions

Explore conceptually related problems

A bettery of emf 10 V and internal resistacne 3 Omega is connected to a resistor. If the current in the circuit is 0.5A, what is the resistance of the resistor ? What is the terminal voltage of the bettery when the circuit is closed ?

The potential difference between the terminals or a battery is 10 V and internal resistance 1 Omega drops to 8 V when connected across an external resistor . Find the resistance of the external resistor.

When a 12V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

There is a potentiometer wire of length 1200 cm and a 60 mA curreut is flowing in it. A battery of emf 5 V and internal resistance of 20 Omega is balanced on this potentiometer wfre with a balancing length 1000 cm. The resistance of the potentiometer wire is

A dry cell of emf 1.5V and internal resistance 0.10 Omega is connected across a resistor in series with a very low resistance ammeter: When the circuit is switched on, the ammter reading settles to a steady value of 2.0A. What is the steady (a) rate of chemical energy consumption of the cell, (b) rate of energy dissipation inside the cell, (c) rate of energy dissipation inside the resistor, (d) power output of the source?

A battery of 20 cells (each having e.m.f. 1.8V and internal resistance 0.1Omega is charged by 220 volts and the charging current is 15A. Calculate the resistance to be put in the circuit.

A 3 volt battery with negligible internal resistance is connected in a circuit as shown in the figure. The current I in the circuit will be :

A battery of e.m.f. 10 V and internal resistance 0.5 ohm is connected across a variable resistance R . The value of R for which the power delivered in it is maximum is given by