Question

When a 12v battery is connected across an unknown resistor, there is a current of 2.5mA in the circuit. find
the value of resistance of the resistor.
19. The magnification produced by a plane mirror is +1. What does this mean?​

Answer 1

Answer:

Potential Difference (V) = 12V

Current (I) = 2.5 mA

= 0.0025 A

∴ V = IR

= 12 = 0.0025R

= 4800 Ω = R

If the Magnification of a Plane Mirror is +1, then it simply means that the image is virtual and it is as same size as the object.

I hope this helps.