## A current-carrying coil behaves like a bar magnet … msa

Question 12: How does a current-carrying coil behaves like a bar magnet? When current passes through a current carrying coil (e-g, a solenoid) it behaves…

## similarities-and-differences-in-motor-effect-and-electromagnetic-induction

Question 1: Make a list of similarities and differences between the motor effect and electromagnetic induction in a moving wire (the dynamo effect). ANSWER A…

## factors-limiting-back-emf

Question 3: What factors limit the size of the back emf? ANSWER The magnitude of the back emf induced in a coil is directly proportional…

## why-is-back-emf-smaller-than-applied-p-d

Question 2: For a simple motor, why must the back emf always be smaller than the applied potential difference? ANSWER We know in an electric…

## back-emf-and-rate-of-doing-work

Question 4: Why does the back emf tend to decrease as the rate of doing work increases? ANSWER We have Here      I = current provided…

## emf-and-change-in-current

ANSWER Faraday’s law of electromagnetic induction states that the magnitude of the induced emf ε is equal to the time rate of magnetic flux through…

## dimensional-correctness

ANSWER The relationship will be dimensionally correct if both sides of the equation have the same dimensions. Take LHS. The dimensions of ε are given…

## formula-for-flux-at-angular-orientation

Question 7: Give formula for the flux linkages in terms of angular orientation. ANSWER Suppose a coil is placed in a uniform magnetic field of…

## electron-beam-in-a-magnetic-field

Question 4: In a uniform magnetic field B, an electron beam enters with velocity v. Write the expression for the force experienced by the electrons.…

## path-of-charged-particle in a uniform magnetic field, Physics 12 … msa

Question 5: What will be the path of a charged particle moving in a uniform magnetic field at any arbitrary angle with the field? ANSWER…