Share & grow the world's knowledge!
We want to connect the people who have knowledge to the people who need it, to bring together people with different perspectives so they can understand each other better, and to empower everyone to share their knowledge.
In a potentiometer experiment, the balancing length with a cell is 120 cm. When the cell is shunted by a 1Ω resistance, the balancing length becomes 40 cm. The internal resistance of the cell is :
In a potentiometer experiment, the internal resistance of the cell can be determined using the formula: L₁/L₂ = r + R/r where L₁ is the original balancing length, L₂ is the new balancing length, r is the internal resistance, and R is the external resistance. Substituting the values, we get r = 3Ω. TRead more
In a potentiometer experiment, the internal resistance of the cell can be determined using the formula:
L₁/L₂ = r + R/r
where
L₁ is the original balancing length, L₂ is the new balancing length,
r is the internal resistance, and R is the external resistance. Substituting the values, we get
r = 3Ω. Therefore, the internal resistance is 3 Ω. The correct answer is (c) 3 Ω.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
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
The total resistance in the circuit is Rcell+Rwire = 3Ω + 3Ω = 6Ω The current is I = 10V/6Ω = 5/3 A. The potential gradient is V/L = IR/500 = 5/3 3/500 = 10 mV/cm. Answer: (b). For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
The total resistance in the circuit is Rcell+Rwire = 3Ω + 3Ω = 6Ω
The current is I = 10V/6Ω = 5/3 A. The potential gradient is V/L = IR/500 = 5/3 3/500 = 10 mV/cm. Answer: (b).
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
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?
Let P₁ and P₂ be powers across R₁ and R₂. In series, power is divided inversely as resistance. In parallel, power is directly proportional to conductance. Using given conditions and solving equations, the ratio P₁ /P₂ = 4. Answer: (b) 4. For more visit here: https://www.tiwariacademy.com/ncert-solutRead more
Let P₁ and P₂ be powers across R₁ and R₂. In series, power is divided inversely as resistance. In parallel, power is directly proportional to conductance. Using given conditions and solving equations, the ratio P₁ /P₂ = 4. Answer: (b) 4.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
The heat produced by 100 W heater in 2 ntinutes is equal to
Heat produced is given by Q = P × t. Gives P = 100W and t = 2minutes = 120s, we get: Q = 100 × 120 = 12000J = 12.0KJ Answer: (c) 12.0 kJ. For more visit here: https://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
Heat produced is given by Q = P × t. Gives P = 100W and t = 2minutes = 120s, we get:
Q = 100 × 120 = 12000J = 12.0KJ
Answer: (c) 12.0 kJ.
For more visit here:
See lesshttps://www.tiwariacademy.com/ncert-solutions/class-12/physics/chapter-3/
What are the different materials used in making musical instruments?
Musical instruments are crafted using various materials, each influencing the instrument's tone. Wood is commonly used in guitars and violins due to its resonant properties. Metal is used in trumpets and cymbals for bright, sharp sounds. Clay is used in instruments like the ghatam, providing a deepRead more
Musical instruments are crafted using various materials, each influencing the instrument’s tone. Wood is commonly used in guitars and violins due to its resonant properties. Metal is used in trumpets and cymbals for bright, sharp sounds. Clay is used in instruments like the ghatam, providing a deep percussive tone. Natural materials like gourds are used in instruments such as the sitar, which enhances resonance. The material plays a crucial role in shaping the instrument’s sound characteristics.
See less