efficiency of a cell connected to a load is 90%. what will be the efficiency of a cell if the load is decreased to 1/3rd of its previous value

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Q. The efficiency of a cell when connected to a resistance

R

60

%. What will be its efficiency of the external resistance is increased to six times.

Q. A cell of internal resistances

r

is connected to a load of resistance

R

. Energy is dissipated in the load, but some thermal energy is also wasted in the cell. The efficiency of such arrangement is found from the expression

\frac{Energy dissipated in the load}{Energy dissipated in the complete circuit}

Which of the following gives the efficiency in this case?

A cell of internal resistance $r$ is connected to a load of resistance $R$ . Energy is dissipated in the load, but some thermal energy is also wasted in the cell. The efficiency of such an arrangement is found from the expression

$\frac{E n e r g y d i s s i p a t e d i n t h e l o a d}{E n e r g y d i s s i p a t e d i n t h e c o m p l e t e c i r c u i t}$

Which of the following gives the efficiency in this case?

Q. The input power to an electric motor is 200 kW. Its efficiency is 80 %. It operates a crane of efficiency 90 %. If the crane is lifting a load of 3.6 tonnes, the velocity with which the load moves is

Q. A generating station is connected with following loads:
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2. An induction motor of 200hp, 0.7 p.f. lagging and efficiency 80%.
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