An electric iron of resistance 20 ohm

Asked by admin @ 10/08/2021 in Science viewed by 353 People

an electric iron of resistance 20 ohm takes a current of 5A. calculate the heat developed in 30 seconds

Answered by admin @ 10/08/2021

H=i^2rt
h = 5^2 * 20 * 30
h = 15000 j

A hair dryer with a resistance of 9.6 ohms operates at 120 volts for 2.5 minutes. the total electrical energy used by the dryer during this time interval is

Asked by maham237 @ 13/01/2021 in Physics viewed by 1200 persons

The electrical resistance in ohms of a certain thermometer

Asked by admin @ 17/08/2021 in Physics viewed by 268 persons

The electrical resistance in ohms of a certain thermometer varies with temperature according to the approximate law: R = Ro [1 + α (T – To)] The resistance is 101.6 …

A piece of wire of resistance 20 ohm

Asked by admin @ 26/08/2021 in Science viewed by 323 persons

A piece of wire of resistance 20 ohm is drawn out as that its length is increased to twice its original length .calculate new resistance.

A metallic wire of resistance 20 ohm is stretched

Asked by admin @ 17/08/2021 in Physics viewed by 290 persons

A metallic wire of resistance 20 ohm stretched until its length is doubled its resistance is

A resistance of 20 kilo ohm has a conductance of

Asked by admin @ 07/08/2021 in Science viewed by 343 persons

A resistance of 20k ohm has a conductance of

The armature of dc motor has 20 ohm resistance

Asked by admin @ 17/08/2021 in Physics viewed by 355 persons

The armature of dc motor has 20 ohm resistance. It draws current of 1.5 A when run by 220 V dc supply, The value of back emf induced in it …

A coil of resistance 20 ohm and inductance 5h

Asked by admin @ 13/08/2021 in Physics viewed by 426 persons

A coil of resistance 10 ohm and an inductance of 5 henry is connected to a 100 volt battery. The energy stored in it is

The resistance of a moving coil galvanometer is 20 ohm

Asked by admin @ 03/08/2021 in Physics viewed by 320 persons

the resistance of a moving coil galvanometer is 20ohm . it require 0.01A current for full scale deflection. Calculate the value of resistance require d to convert it into a …

A galvanometer of resistance 20 ohm gives full scale deflection

Asked by admin @ 02/08/2021 in Physics viewed by 297 persons

A galvanometer of resistance 20 ohm gives full scale deflection

A wire of resistance 5 ohm is bent

Asked by admin @ 29/08/2021 in Physics viewed by 358 persons

a wire of resistance 5 ohm is bent in the the form of a circle . what is the effective resistance between the two ends of any diameter of the …

An lcr series circuit with 100 ohm resistance

Asked by admin @ 29/08/2021 in Physics viewed by 321 persons

A LCR series circuit with 100 ohm resistance is connected to an ac source of 200 V and angular frequency of 300 rad/s. When only the capacitance is removed, the …

When a resistance of 2 ohm is connected

Asked by admin @ 26/08/2021 in Physics viewed by 334 persons

when a resistance of 2 ohms is connected across the terminals of a cell the current is 0.5 amperes,when the resistance is increased to 5 ohms, the current is 0.25 …

A uniform wire of resistance 18 ohm is bent

Asked by admin @ 23/08/2021 in Physics viewed by 400 persons

A uniform wire of resistance 18 ohms is bent in the form of circle . The effective resistance across the points a and b is

A silver wire has a resistance of 2.1 ohm

Asked by admin @ 23/08/2021 in Physics viewed by 369 persons

Question 3.7: A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. Determine the temperature coefficient of resistivity of …

A copper wire has a resistance of 0.5 ohm

Asked by admin @ 23/08/2021 in Physics viewed by 310 persons

a copper wire has a resistance of 0.5ohm.another wire of the same mass as the first one is double in length of first.find the resistance of second wire