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Electric Circuits
A 4.5V flashlight draws current from of 400mA when the light is on. If the light is on for 50 seconds, what quantity of electrical potential energy is converted into heat, using Given, Required, Analysis & Solution, Paraphrase.
Electric Circuits
The volume of liquid flowing per second is called the volume flow rate Q and has the dimensions of [L]3/[T]. The flow rate of a liquid through a hypodermic needle during an injection can be estimated with the following equation:
Q = Rn(P2 - P1)/(8L)
The length and radius of the needle are L and R, respectively, both of which have the dimension [L]. The pressures at one end of the needle and the other end are P2 and P1, both of which have the dimensions of [M]/{[L][T]2}. The symbol represents the viscosity of the liquid and has the dimensions of [M]/{[L][T]}. The symbol stands for pi and, like the number 8 and the exponent n, has no dimensions. Using dimensional analysis, determine the value of n in the expressions for Q.
Q = Rn(P2 - P1)/(8L)
The length and radius of the needle are L and R, respectively, both of which have the dimension [L]. The pressures at one end of the needle and the other end are P2 and P1, both of which have the dimensions of [M]/{[L][T]2}. The symbol represents the viscosity of the liquid and has the dimensions of [M]/{[L][T]}. The symbol stands for pi and, like the number 8 and the exponent n, has no dimensions. Using dimensional analysis, determine the value of n in the expressions for Q.
Electric Circuits
an immersion heater has rating of 2kw,220v while in use. calculate
1) current passing through it
2)its resistance
1) current passing through it
2)its resistance
Electric Circuits
what should be the length of a nichrome wire of resistance 4.5ohm if the length of a similar wire is 60cm and resistance 2.5 phm
Electric Circuits
two wires are made up of two different materials whose specific resistance are in the ratio 2:3,lenths are in ratio of 3:4 and area of cross-sections are in the ratio 4:3.find the ratio of their resistances
Electric Circuits
there is a combination of two resistance 10ohm and 20ohm in parallel.what will be the effective resistance if 10ohm resistance get broken
Electric Circuits
when the terminal potential difference of a real cell is less than its emf
Electric Circuits
state true or false-if for a given current,resistance is changed from R to R/n,power consumed changes from P to nP
Electric Circuits
how do i connect a brushless vibration motor to 3V DC supply.I am trying to connect the motor to hinges to make a small vibrating system.
Electric Circuits
a electric iron draws a current of 0.5A when voltage is 200V . calculate the charge flowing through it in one hour.
