A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine

Similar Questions

A gas would serve as an electrical conductor under ...

The bulb of a motorcycle head-lamp is marked 40W, 6V. The resistance of the filament when it is swit...

Which of the following substance is not a good conductor of electricity? ...

Rectifiers are used to convert ...

In the circuit diagram above. Calculate the energy stored in the inductor at resonance ...

A 90W immersion heater is used to supply energy for 5 minutes. The energy supplied is used to comple...

Which of the following devices are used to measure pressure? i. Aneroid barometer. ii. hydromete...

Total internal reflection occurs when light moves from? ...

The equivalent capacitance of a 3$\mu F$ capacitor and a 6$\mu F$ capacitor connected in paralle...

A 40 kW electric cable is used to transmit electricity through a resistor of resistance 2.0Ω at 80...