The direction of the current in a circuit is drawn in the direction in which positively charged particles would move, even if the current is constituted by the negatively charged...
Given: r = 0.4 mm = 0.4 × 10-3 m, I = 2 A
To find: Current density (J)
Formula: J = \(\frac{I}{A}\)
Calculation: From formula,
J = \(\frac{2}{3.142\times(0.4)^2\times10^{-6}}\)
= 3.978 × 106 A/m2
Given: I = 6 A, V = 230 V, t = 5 hours
To find: Power (P), Energy consumed
Formulae: i. P = IV
ii. Energy consumed = power × time
Calculation: From formula...
Given: I = 6 A, V = 220 volt, t = 2 hour
To find: i. Power of heater (P)
ii. Electric energy consumed (E)
Formulae: i. P = IV
ii. Electric energy consumed
=...
Correct Answer - 3
Let the equation of the circle be
`x^(2)+y^(2)+2gx+2fy+c=0` (1)
The line `lx +my+1=0` will touch circle (1) if the length of perpendicular from the center `( -g,...
