UPS uses which of the following device to control interruption in power supply?
a) battery
b) capacitor
c) resistor
d) all of these
Explanation:An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode.
Which of the
following is performed by UPS?
a) resist voltage change
b) limit the
current
c) convert DC voltage to AC
d) store energy
Explanation: In direct current, the voltage is always constant, and the electricity flows in a certain direction. In contrast, in alternating current, the voltage periodically changes from positive to negative and from negative to positive, and the direction of the current also periodically changes accordingly.
Which of the
following is detected by the UPS?
a) loss in primary power source
b) reduction in primary power source
c) resistance in the circuit
d) both a and b
Which of the following is used in UPS to convert DC voltage to AC voltage?
a) inverter
b) resistor
c) converter
d) all of these
Which of the following reaction takes place when baking soda and vinegar are mixed?
a) chemical
b) physical
c) biological
d) geological
Which of the following gas is produced when baking soda and vinegar are mixed?
a) oxygen
b) nitrogen
c) methane
d) carbon dioxide
