Kirchhoff first law for electrical circuits states that A) the sum of the emfs around any loop in a circuit is equal to the sum of the potential differences around the loop B) the sum of the currents entering any point in a circuit is equal to the sum of the currents leaving that same point. C) the currents entering any point in a circuit is equal of the currents leaving the largest resistor. D) the sum of the emfs around any loop in a circuit is equal to the potential differences around the loop with the largest resistor

What will happen to the current in a circuit of constant resistance if the voltage is doubled? A) the current is doubled B) the current reduces to zero. C) the current is halved. D) there is no change in the current.

Drift velocity is the A)steady average speed of electrons in good conductors B) steady average speed of protons in good conductors C) maximum speed of electron sin good conductors D) maximum speed of protons in good conductors