hirwajuruherve hirwajuruherve

16-01-2024
Physics

Answered

The electric charge flowing through a wire and crossing its 2 cm2 section is described by the expression q(t) = 3 − 4t + 5t 2 where t is in seconds and q in coulombs. i) Find an expression for the electric current i(t), ii) What is the current density J at t=1s? iii) What is the resistance of wire if the wire’s resistivity is 1.72x10 -8 Ω m at room temperature and its length is 100m?

Answer :

Other Questions

During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exert

Taking R = 1.00 kΩ and ε = 250 V in Figure 3, determine the direction and magnitude of the current in the horizontal wire between a and e.

A test charge moves from point A to point C. At point A it has a speed of 200 m/s at point A. Its mass is 1.7*10^-29 kg and charge is -1nC. What is the potentia

A calorimeter of negligible heat capacity contains 1.00 of water at 303 and 50.0 of ice at 273 . Note: the specific heat of the water is 4.184 and the fusi

The power of two electric bulbs connected with 200 V is 300 watt and 100 watt. WHAT WILL BE THE RATIO OF THEIR RESISTANCE?

A dog’s fur is combed and the comb gains a charge of 1.75 μC. What is the electric force between the fur and the comb when the two are separated by 4.16 cm?

Compared to its length in the spring, by what amount ΔLwinter does the length of the bridge decrease during the Teharian winter when the temperature hovers arou

rod of 2 length and a square (2 × 2)cross sectional is made of a material with a resistivity of 6 × 10−8Ω. ,If a potential difference of 0.5 is placed across t

A laser beam is incident at an angle of 29.2° to the vertical onto a solution of corn syrup in water. (a) If the beam is refracted to 19.16° to the vertical, wh

554. A vehiche Moving with velocity V experienced a force, due to air resistance given by F = = = = = CP°√³AV Where Pis density of air, A is the the Cross Secti