Question

a) When is the force experienced by a current carrying conductor placed in a magnetic field the largest ?

b) What are the factors on which the resistance depends ?

c) Differentiate between OverLoading and Short Circuiting.

d) A lens having focal length 15cm, Calculate its Power ?

Answer 1

a) its is depend on given current

When current is more then magnetic field is more

When current is less the magnetic field is less

b) 1) length of wire

2) crossectional area of wire

3) temp.

4) nature of material

C) overloading= when no. Of appliances connected only one socket.. Its called overloading

Shortcircuit= when live wire directly touch neutal wire its called shortcircuit

D) f= 15cm

Cm convert m

f= 15/100

f= 0.15m

Then

P= 1/f(m)

P= 1/0.15

P= 6.6D

Good luck