1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

022-62211530

Mon to Sat - 11 AM to 8 PM

Queries asked on Sunday and after 7 pm from Monday to Saturday will be answered after 12 pm the next working day.

• CBSE×
• Class 12 Science×
• Physics×
• Current Electricity×
• Resistance×

# Resistance Free Doubts and Solutions

## A 9 V battery is connected in series with a resistor .The terminal voltage is found to be 8 V. Current through the circuit is measured as 5 A. What is the internal resistance of the battery?

Asked by ayushmittal2424 9th December 2018, 9:45 PM

×

## Establish the expression for current flowing through an external resistance R connected to a cell of e.m.f. E and internal resistance r.

Asked by sd2021667 2nd December 2018, 9:09 PM

×

## Draw a circuit diagram for the comparying of emf of two primary cell using a potentiometer

Asked by rohitbansal39295 15th November 2018, 9:00 PM

×

## two cells of voltage 10 v and 2 v and internal resistances of 10ohm and 5 ohm respectively, are connected in parallel with positive end of 10v battery connected to negative pole of 2v battery.find the effective voltage and effective internal resistance of the combination.

Asked by my3shyll 24th September 2018, 7:33 PM

×

## Can you please provide me the derivation for wheatstone bridge [R1/R2 = R3/R4] ....... Tomorrow I have my exams..........

Asked by pksunilnair 19th October 2017, 7:39 PM

×

## explain Terminal potential potential dufference and its relaition with  e.m.f and internal resistance during discharging and charging

Asked by modi72879 31st May 2017, 9:23 PM

×

## what do you understand by sensitiveness of potentiometer

Asked by vinodjoshi112233 29th May 2017, 10:46 AM

×

## A cell of emf E and internal resistance r is connected to two external resistance R1 and R2 and a perfect ammeter.The current in the circuit is measured in four different situation: (i)without any external resistance in the circuit (ii)with resistance R1 only (iii)with Ri and R2 in series combination (iv)with R1 and R2 in parallel combination The currents measured in the four cases are 0.42A,1.05A,1.4A and 4.2A,but not necessarily in that order.Identify the currents corresponding to the four cases mentioned above.

Asked by Abinash Basistha 18th January 2017, 4:00 PM

×

## in spite of having  magnitude as well as direction , why the electric  current  is  a scalar quantity ? pls explain  briefly .

Asked by ppratim02 19th August 2016, 7:47 PM

×

## Q.1 WHY EMF OF MWIN CIRCUIT SHOULD ALWAYS BE GREATER THAN SECONDARY CIRCUITS ?

Asked by tajalanamdinkarmani4569 13th February 2016, 7:40 PM

×

## three resistors 3ohms,4ohms,6ohms in parallel the combination is connected to a cell of a emf 2V internal resistance 2/3ohms.find current through different branches

Asked by Subhashree Lenka 28th August 2015, 10:40 AM

×

## To study the variation in current flowing in a circuit containing an LDR beacuse of varation in   a) the power of the incardescent lamp used to illuminate the LDR (keeping all lamp at a fixed distance)   b)the distance of a incardescent lamp of fixed power used to illuminte the LDR

Asked by hasanali.ali986 19th May 2015, 3:58 PM

×

## you have given a primary cell and a secondary cell of the same emf. From which cell will you be able to draw larger current and why?

Asked by justin 21st March 2015, 7:54 PM

×

## A cell of emf E and internal resistance r is connected to two external resistances R1 and R2 and a perfect ammeter. The current in the circuit is measured in four different situations: (i) Without any external resistance in the circuit (ii) with resistance R1 only (iii) With R1 and R2 in series combination (iv) with R1 and R2 in parallel combination The currents measured in the four cases are 0.42 A, 1.05A, 1.4 A and 4.2A, but not necessarily in that order. Identify the current corresponding to the four cases mentioned above.

Asked by Topperlearning User 1st July 2014, 3:44 PM

×

## What does Voltage basically mean? physically what does it mean? i am not able to understand. like current means flow of charges. what does voltage actually mean? i dont want the definition. i want to know what it actually means? and also difference between emf & voltage & potential difference & potential drop?

Asked by Abhishek Wagle 24th June 2014, 5:50 PM

×

## A battery of emf 2.5 V and internal resistance r is connected in series with a resistor of 45 ohm through an ammeter of resistance of 1 ohm. The ammeter reads current of 50 mA. Draw the circuit diagram and calculate the value of r.

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## What is the purpose of using a resistance in series during charging a circuit?

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## Why the light of a motor vehicle becomes dim when it is started?

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## A battery of 10 V and internal resistance of 2 ohm is connected to a resistor R. Calculate the value of R, if the current in the circuit is 0.5 A. Also find the terminal voltage of the battery when the circuit is closed?

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## Differentiate between Emf and Potential difference of a cell.

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## Under what condition, the terminal potential difference of a cell is greater than its emf.

Asked by Topperlearning User 4th June 2014, 1:23 PM

×

## A resistance R is connected across a cell of emf ε and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell as V. Write the expression for 'r' in terms of ε, V and R.

Asked by Topperlearning User 23rd April 2014, 4:20 PM

×

## A battery of emf 5 V and internal resistance of 0.5 ohm is connected across a resistance of 14.5 ohm. How many electrons pass through a cross-section of the resistance in 2 seconds?

Asked by Topperlearning User 23rd April 2014, 4:12 PM

×

## The potential difference across a cell is 2 V when a current of 1 A is drawn from it. The potential difference falls to 1.8 V when a current of 1.2 A is drawn. Find the emf and internal resistance of the cell.

Asked by Topperlearning User 22nd April 2014, 5:16 PM

×

## A cell of emf 8 V and internal resistance of 0.5 ohm is connected across a load of resistance (i) 15.5 ohm (ii) 11.5 ohm. Calculate the potential drop in each case.

Asked by Topperlearning User 22nd April 2014, 4:50 PM

×

## What do you know about the internal resistance of the cell? On what factors does it depend?

Asked by Topperlearning User 22nd April 2014, 4:39 PM