20EE1001 - Class Test 1

An alternating sine wave has maximum value of 230 V. Its value at 90° is

• 230V

• 190V

• 115V

If the frequency of an AC system is 50Hz, its Time period (T) is

• 20ms

• 10ms

• 50ms

In a three-phase system, the phase voltages are separated by ____degrees.

• 120

• 60

• 180

In the following, which is not a type of cable?

• BEC

• VIR

• PVC

• TRS

In ___________ wiring, single lamp is controlled 2-two-way switches.

• stair-case

• fluorescent

• cleat

The household energy meter is ________ instrument.

• an Integrating

• a recording

• an indicating

An electronic energy meter makes use of _____

• Integrated Circuit (IC)

• Transformer

• CRO

Find the energy consumed per month by 5 LED’s of 10W each, if it is operated for 6 hours a day ______

• 9kWh

• 8kWh

• 6kWh

Fusing factor of a fuse is always ____

• more than 1

• less than 1

• zero

The full form of UPS is

• Uninterruptable Power Supply

• Unwanted Power Supply

• Unused Power Supply