Advertisements
Advertisements
प्रश्न
State whether the resistivity of a wire changes with the change in the thickness of the wire.
Advertisements
उत्तर
`R = (rhoL)/A`
`:. rho = (RA)/L`
`A = pir^2= (R(pir^2))/L`
⇒ Resistivity `ar^2 =>`Thus if thichkness increases resistivity increases.
APPEARS IN
संबंधित प्रश्न
How much energy is given to each coulomb of charge passing through a 6 V battery?
How much work is done in moving a charge of 2 C across two points having a potential difference of 12 V?
Keeping the potential difference constant, the resistance of a circuit is doubled. The current will become:
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
Write proper word from the following group of words in the blank.
(magnetism, 4.5V, 3.0V, gravitational attraction, potential difference, potential, higher, lower, 0V)
Water in the waterfall flows from a higher level to the lower level because of ______.
A 10 m long wire of a particular material is of resistance 5Ω What will be the resistance of 10m long wire of the same material but the double radius.
Conceptual question.
Does a solar cell always maintain the potential across its terminals constant? Discuss
State Ohm’s law.
______ is work done per unit charge.
Study the following circuit and find:
- Effective resistance of the circuit
- Current drawn from the battery
- Potential difference across the 5 omega resistor
