A milliammeter has an internal resistance of 5ohms and reads upto 20 millianmeter, cal the value of the resistance
that should beconnected to it to enable to read up to
5A

Rs = 0.02008 Ω = 20.08 mΩ

Explanation:

The range of an ammeter can be increased by connecting a small shunt resistance to it in a series combination. This shunt resistance can be calculated by the following formula:

where,

= value of shunt resistance = ?

= current range of ammeter = 20 mA = 0.02 A

I = Required range of ammeter = 5 A

= Resistance of ammeter = 5 ohms

Therefore,

Rs = 0.02008 Ω = 20.08 mΩ

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

spectral lines lyman is one set