Current Electricity

Related Questions

• In a neon discharge tube $2.9 \times {10^{18}}\,N{e^ + }$ ions move to the right each second while $1.2 \times {10^{18}}$ electrons move to the left per second. Electron charge is $1.6\times10^{-19}C$. The current in the discharge tube

  ---

• A wire of radius r has resistance R. If it is stretched to a radius of $\frac{3r}{4}$, its resistance becomes

  ---

• In potentiometer a balance point is obtained, when

  ---

• Two resistors whose value are in ratio 2 : 1 are connected in parallel with one cell. Then ratio of power dissipated is

  ---

• An ammeter of 100 $\Omega$ resistance gives full deflection for the current of $10^{–5}$ amp. Now the shunt resistance required to convert it into ammeter of 1 amp. range, will be

  ---