Advertisements
Advertisements
प्रश्न
Calculate the amount of energy transferred by a 10 A electric current flowing through a resistor of 5 o for 15 minutes.
Advertisements
उत्तर
As per Joule's law,
H=I2Rt
Here, I= 10 A, R = 5`Omega` and t=15 mins = 900s
H = (10)2 x 5 x (900) = 4.5 x 105 J
APPEARS IN
संबंधित प्रश्न
Choose the correct alternative and rewrite the following sentence.
When the resistance of a conductor increases, the current will ________ increase.
Which of the two is connected in series : ammeter or voltmeter?
A battery of e.m.f. 15 V and internal resistance 3 ohm is connected to two resistors of resistance 3 ohm and 6 ohm in series. Find:
(i) The current through the battery,
(ii) The p.d. between the terminals of the battery.
Find the effective resistance in the following circuit diagrams (Fig.):
A geyser is rated 1500 W, 250 V. This geyser is connected to 250 V mains. Calculate:
- The current drawn,
- The energy consumed in 50 hours, and
- The cost of energy consumed at ₹ 4.20 per kWh.
In current electricity, a positive charge refers to ______.
