Question 18 (1 points) a step-up transformer connected to a 110-v line is used to supply a hydrogen-gas discharge tube with 5.0 kv (rms). the tube dissipates 75 w of power. what is the ratio of the number of turns in the secondary winding to the number of turns in the primary winding?

N₂/N₁ = 45

Explanation:

The relation of the number of turns with the voltage is given by the EMF equation of transformer:  

(1)

where V₁: voltage of the primary winding, V₂: voltage of the secondary winding, N₁: number of turns in the primary winding, and N₂: number of turns in the secondary winding

Assuming that the primary winding is connected to the input voltage supply, and using equation (1), we can calculate the ratio of N₂ to N₁:

So, the ratio N₂/N₁ is 45.

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explanation:

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.