What is the length of wire of resistance 3 Ohm?

A wire of 3 ohm resistance and 10 cm length is stretched to 30 cm length.

When two 2 resistances are in parallel the effective resistance is?

When two resistors are connected in series, their effective resistance is 80 Ω. When they are connected in parallel, their effective resistance is 20 Ω.

How is the resistance of a wire affected if only its length is doubled?

(a) Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled. Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth.

What is the resistance when a wire is stretched 3 times?

Thus, R2 = 9 *10= 90 Ohm. When the wire is stretchedto 3 times radius will be reduced by √3. Cross sectional area will be reduced 3 times. Resistance will increase proportionally for the same length. is. 30 ohms for same original length and resistance for the 3 times the length will be 90 ohms.

What is the resistance of a 10 ohm wire?

A wire has a resistance of 10 ohms. It is stretched to 3 times its original length. What will be the new resistance and new resistivity? – Quora A wire has a resistance of 10 ohms. It is stretched to 3 times its original length.

What is the final resistance when a wire is split in half?

With half of the cross-sectional area, the ohms-per-foot doubles. It is as if you’ve split the wire lengthwise. But the length has doubled, so double that resistance. Therefore the final resistance is 4 x 3 ohms = 12 ohms. You can do this more simply for any stretching factor by multiplying the original resistance times t

What is the resistance of a 25cm wire?

A wire of length 25cm has a resistance of 5 Ohm. The wire is so stretched that its new resistance becomes 45 Ohm. What is the length of the wire? Let the resistivity of the material of the wire be rho Ohm-cm. Let the original radius of wire be r cm.

https://www.youtube.com/watch?v=EJf17eUuww4