हिंदी

A conductor of length ‘l’ is rotated about one of its ends at a constant angular speed ‘ω’ in a plane perpendicular to a uniform magnetic field B. Plot graphs to show variations of the emf induced - Physics

Advertisements
Advertisements

प्रश्न

A conductor of length ‘l’ is rotated about one of its ends at a constant angular speed ‘ω’ in a plane perpendicular to a uniform magnetic field B. Plot graphs to show variations of the emf induced across the ends of the conductor with

  1. angular speed ω and
  2. length of the conductor l.
आलेख
Advertisements

उत्तर १

Induced emf  (E) = `(B omega l^2)/2`

shaalaa.com

उत्तर २

i. e = `1/2 B omega L^2`

So, e ∝ ω

ii. e = `1/2 B omega L^2`

So, e ∝ L2

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2019-2020 (March) Delhi Set 2

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

The storage battery of a car has an emf of 12 V. If the internal resistance of the battery is 0.4 Ω, what is the maximum current that can be drawn from the battery?


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


Find the value of i1/i2 in the following figure if (a) R = 0.1 Ω (b) R = 1 Ω and (c) R = 10 Ω. Note from your answers that in order to get more current from a combination of two batteries, they should be joined in parallel if the external resistance is small and in series if the external resistance is large, compared to the internal resistance.


Find the equivalent resistance of the network shown in the figure between the points a and b.


Do the electrodes in an electrolytic cell have fixed polarity like a battery?


A plate of area 10 cm2 is to be electroplated with copper (density 9000 kg m−3) to a thickness of 10 micrometres on both sides, using a cell of 12 V. Calculate the energy spent by the cell in the process of deposition. If this energy is used to heat 100 g of water, calculate the rise in the temperature of the water. ECE of copper = 3 × 10−7 kg C−1and specific heat capacity of water = 4200 J kg−1.


Two cells of emfs approximately 5 V and 10 V are to be accurately compared using a potentiometer of length 400 cm.


An energy source will supply a constant current into the load if its internal resistance is ______.

Five cells each of emf E and internal resistance r send the same amount of current through an external resistance R whether the cells are connected in parallel or in series. Then the ratio `("R"/"r")` is:


Study the two circuits shown in the figure below. The cells in the two circuits are identical to each other. The resistance of the load resistor R is the same in both circuits.

If the same current flows through the resistor R in both circuits, calculate the internal resistance of each cell in terms of the resistance of resistor R. Show your calculations.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×