If several resistors are connected in series in

an electric circuit, the potential difference across

each resistor

(1) varies directly with its resistance

(2) varies inversely with its resistance

(3) varies inversely with the square of its

resistance

(4) is independent of its resistance

varies directly with its resistance

Explanation:

In a serious circuit, the potential difference across each resistor varies directly with its resistance. The sum of the potential drops across all the resistors equals the applied potential

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.