Advertisements
Advertisements
प्रश्न
The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of heat produced in the resistor will become ______.
विकल्प
four times
two times
half
one forth
उत्तर
The resistance of a resistor is reduced to half of its initial value. If other parameters of the electrical circuit remain unaltered, the amount of heat produced in the resistor will become two times.
Explanation:
If V is constant, then H is inversely proportional to R because H = V2 t/R. H will therefore double if R does.
APPEARS IN
संबंधित प्रश्न
Write the formula of resistivity
Name the unit of electrical resistance and give its symbol.
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of 1 A.
The resistivity of copper = 1.7 × 10–8 Ω m
Rewrite the following statement by selecting the correct option.
The S.I. unit of resistance is __________.
Define ampere and volt with respect to Ohm’s law.
Answer the following question.
Distinguish between Ohmic and non-ohmic substances; explain with the help of example.
Assertion: The statement of Ohm’s law is K = IR.
Reason: V = IR is the equation which defines resistance.
Ohm's law deals with the relationship between ______
State Ohm's Law. Represent it mathematically.
A current of 3.2 mA flows through a conductor. If charge on an electron is - 1.6 × 10-19 coulomb, find the number of electrons that will pass each second through the cross section of that conductor.
