Coiling wire around an iron core and applying an electric current through the wire creates a temporary magnet called an electromagnet. what would increase the strength of an electromagnet? a) use a smaller nail. b) use a battery with less voltage. c) use a battery with more voltage. d) use fewer coils of wire around the nail.

C) Use a battery with more voltage.

Explanation:

The equation for the magnetic field around a coil is given by,

B = μ₀NI

where,

B = Magnetic flux density

μ₀ = permeability

N = number of turns per meter

I = Current in the wire

So when using a higher voltage battery, more current passes through the battery as resistance of the wire remains the same.

question1

1,000 tons

question2

3: 8

question 3

store d

step-by-step explanation:

vapour or gas assuming atmospheriv pressure