Advertisements
Advertisements
प्रश्न
Calculate the quantity of heat that will be produced in a coil of resistance 75 Ω if a current of 2A is passed through it for 2 minutes.
Advertisements
उत्तर
R = 75 Ω, i = 2A, t = 2 minutes = 2 × 60 s = 120 s
Heat energy produced in the coil, H = i2Rt
= 22 × 75 × 120
= 300 × 120 = 36000 J
APPEARS IN
संबंधित प्रश्न
Complete the following :-
(a)
Write any two characteristics of a series combination of resistors.
Two resistors of 4Ω and 6 Ω are connected in parallel to a cell to draw 0.5 A current from the cell.
(i) Draw a labelled circuit diagram showing the above arrangement.
(ii) Calculate the current in each resistor. What is an Ohmic resistor?
Calculate the equivalent resistance of the following combination of resistor r1, r2, r3, and r4
State a relation between electrical power, resistance and potential difference in an electrical circuit.
Six resistances are connected together as shown in the figure. Calculate the equivalent resistance between points A and B.
2Ω resistor A, 1Ω resistor B and 4Ω resistor C are connected in parallel. The combination is connected across a 2V battery of negligible resistance. Draw the diagram of the arrangement and calculate:
(i) The current in each resistor A and C,
(ii) The current through battery.
Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances.
