Table of Contents
What is R in H i2RT?
In the formula H=i2RT, Resistance is directly proportional to the heat but in the formula H= V2T/R, resistance is inversely proportional to heat.
Which formula is correct H IRT?
H=i2Rt.
When resistance increases what happens to heat?
A higher resistance produces more heat. The time, t for which current flows. The longer the time the larger the amount of heat produced.
How do you derive H I2Rt?
Answer:
- To derive: Heat produced in a resistor is as follows.
- H = I²RT.
- Derivation: We derive potential difference as the work done to transport a charge from one point to another.
- => W = V × Q ……………(1) We also know that.
- V = I × R ……….(2)
- Q = I × T ………..(3)
- => W = I²RT.
- So, H = I²RT.
Which statement is correct for H and I in joules law of heating?
Joule’s Law Definition Joule’s law, when an electric current passes through a conductor, heat H is produced, which is directly proportional to the resistance R of the conductor, the time t for which the current flows, and to the square of the magnitude of current I. Mathematically it is represented as H ∝ I² . Rt.
What is the formula for joules of heating?
Joule’s Law states that H (Heat) = I (Current) x V (Voltage) x T (Time the current is allowed to flow). Or, written differently, H (Heat) = I2 (Current squared) x R (Resistance) x T (Time the current is allowed to flow).
How is H=v2t possible if H is directly proportional to R?
Originally Answered: H=I2rt so h is directly proportional to r . So how is h=v2t possible? According to joules law of heating, in the expression H=I^2 * Rt ,the heat produced is directly proportional to resistance of wire when the current flowing through the resistor is constant.
Is the rate of heat production proportional to the resistance?
Power, rate of heat production is i^2 R. where I is ctrrent in amperes, R is resistance in Ohms and power is in watts. So according to this, thetime rate rate of heat production IS roportional to Resistance, but it is not so simple, because the current is also dependent on R, by Ohm’s law.
What is the law of heating of a resistor?
According to joules law of heating, in the expression H=I^2 * Rt ,the heat produced is directly proportional to resistance of wire when the current flowing through the resistor is constant. In the expression , H=v^2 /Rt the heat produced is inversely proportional to resistance of wire when voltage across the resistor is constant.
What is the meaning of H=V^2/rt?
In the expression , H=v^2 /Rt the heat produced is inversely proportional to resistance of wire when voltage across the resistor is constant. The first equation is used when devices are connected in series. The second is used when device is connected in Parallel. Hope this will clear your doubt.