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Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

In a meter bridge experiment, resistance box (with R = 2 Ω) is connected in the left gap and the unknown resistance S in the right gap. If the balancing length be 40 cm, calculate the value of S

Using the meter bridge formula R/S = L1/(100 – L1), we substitute R = 2Ω, L1 = 40 cm: 2/S = 40/60 Solving, S = 3Ω. Correct answer: (b) 3Ω. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ ...

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Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

For a cell of emf 2 V, a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a 2 n resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is:

Using the potentiometer principle: E∝L Initially, the balance length is L₁ = 50 cm. When the cell is shunted by Rₛ = 2 Ω, the new balance length is L₂ = 40 cm. Class 12th Science Physics NCERT MCQ Questions

Manish rai

Asked: February 21, 2025In: Class 10 Maths

What is the importance of Class 10 Mathematics Chapter 3 MCQ?

Class 10 Maths Chapter 3 focuses on the Pair of Linear Equations in Two Variables , a vital topic for exam preparation. Students can practice MCQs with answers to strengthen their understanding and assess their knowledge. For additional convenience, downloadable ...

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Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

Two cells when connected in series are balanced on 8 m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2 m. The ratio of the cmf’s of the two

Let the EMFs of the two cells be E₁ and E₂. In series: E₁ + E₂ ∝ 8 m With one reversed: E₁ – E₂ ∝ 2 m Solving, (E₁ + E₂) / (E₁ – E₂) = 8/2 = 4.

Poll

Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

A cell of internal resistance 3 Ω and emf 10 V is connected to a uniform wire of length 500 cm and resistance 3 Ω. The potential gradient in the wire is

Total resistance is 6Ω, current is 5/3 A, potential drop across the wire is 5V and the potential gradient is 10 mV/cm. Correct answer: (b) 10 mV/cm. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.

Poll

Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

When two resistances R₁ and R₂ are connected in series, they consume 12 W power. When they are connected in parallel, they consume 50 W power. What is the ratio of the Power of R₁ and R₂?

Using power formulas for series and parallel combinations, the ratio of power consumed by R₁ and R₂ is 1/4. Correct answer: (a) 1/4. Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.

Manish rai

Asked: February 21, 2025In: Class 10 Maths

What is the importance of Class 10 Mathematics Chapter 7 MCQ?

Class 10 Maths Chapter 7, Coordinate Geometry , is a vital topic for mastering problem-solving skills. Students can practice MCQs with answers to test their understanding of key concepts like the distance formula , section formula and midpoint formula ...

Manish rai

Asked: February 21, 2025In: Class 10 Maths

What is the importance of Class 10 Mathematics Chapter 2 MCQ?

Preparing for Class 10 Maths Chapter 2 MCQ is essential for board exams. Students can practice Polynomials Class 10 MCQ with Answers from NCERT Class 10 Maths Chapter 2 MCQ PDFs available online. Various platforms provide CBSE Class 10 Maths ...

Poll

Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

A cell supplies a current of 0-9 A through a 2Ω resistor and a current of 0-3 A through 7 Ω resistor. The internal resistance of the cell is :

The internal resistance of the cell is 0.5 Ω, calculated using Ohm’s law by equating EMF expressions for both resistor cases. Correct answer: (d). Class 12th Science Physics NCERT MCQ Questions NCERT Books MCQ Questions Session 2024-2025.

Poll

Vivek Kohli

Asked: February 21, 2025In: Class 12 Physics

In Wheatstone’s bridge, all the four arms have equal resistance R. If resistance of the galvanometer arm is also R, then equivalent resistance of the combination is

The Wheatstone bridge is balanced since all four arms have equal resistance R. The galvanometer arm also has resistance R. The equivalent resistance of the entire network simplifies to R, using series-parallel reduction. Hence, the correct answer is (a) R.

In a meter bridge experiment, resistance box (with R = 2 Ω) is connected in the left gap and the unknown resistance S in the right gap. If the balancing length be 40 cm, calculate the value of S

For a cell of emf 2 V, a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a 2 n resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is:

What is the importance of Class 10 Mathematics Chapter 3 MCQ?

Two cells when connected in series are balanced on 8 m on a potentiometer. If the cells are connected with polarities of one of the cell is reversed, they balance on 2 m. The ratio of the cmf’s of the two

A cell of internal resistance 3 Ω and emf 10 V is connected to a uniform wire of length 500 cm and resistance 3 Ω. The potential gradient in the wire is

When two resistances R₁ and R₂ are connected in series, they consume 12 W power. When they are connected in parallel, they consume 50 W power. What is the ratio of the Power of R₁ and R₂?

What is the importance of Class 10 Mathematics Chapter 7 MCQ?

What is the importance of Class 10 Mathematics Chapter 2 MCQ?

A cell supplies a current of 0-9 A through a 2Ω resistor and a current of 0-3 A through 7 Ω resistor. The internal resistance of the cell is :

In Wheatstone’s bridge, all the four arms have equal resistance R. If resistance of the galvanometer arm is also R, then equivalent resistance of the combination is

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