જ્વાળા: ધુમાડો:: બરફ : ___

જ્યાં ઉપમેયનો ઉલ્લેખ જ કરવામાં ન આવે અને ઉપમાન જ ઉપમેય હોય ત્યારે દ્રષ્ટાંત અલંકાર બને છે. - આ કથન સત્ય છે કે નહિ અને જો ખોટું હોય તો સત્ય કથન કયું હોઈ શકે?

In a 3-phase, 4-wire, 400/230 V system, a lamp (L1) of 100 W is connected to one phase and neutral and a lamp (L2) of 150 W is connected to the second pahse and neutral. If the neutral wire is disconnected accidently, what will be the voltage across a 100 W lamp (L1)?

When neutral disconnected Lamp are in series connection,
So, for series connection current is same for both Lamp,
Resistance of Lamp (L1) = (230)²/P
= (230)²/100
= 529 ohm
Resistance of lamp (L2) = (230)²/150
= 352.67 ohm
So, current through the lamp = E/(R1 + R2)
= 400/(529 + 352.67)
= 0.454 A
Voltage across lamp (L1) = I*R1
= 0.454*230
= 240 V

નીચે પૈકી 'અચરજ'નો પર્યાયી શબ્દ ક્યો છે?

A given solar cell has the following specifications:
Open-circuit voltage, Voc: 0.7 V
Short-circuit current, Isc: 3.5 A
Short-circuit current, Isc: 3.5 A
Short-circuit current, Isc: 3.5 A
If the solar cell operates at maximum power point, calculate the efficiency.

Equation is given by:
Efficiency = (F.F*Voc*Isc)/Pin
= (0.6*3.5*0.7)/10
= 0.14702
% efficiency = 14.7 %

The normal percentage bias setting of differential relay used for transformer protection will be

In bias differential protection for transformer,
There are two basic settings required to setup the percentage biased differential protection.
1. Minimum pickup
2. The slope.

The minimum pick-up covers the transformer magnetizing current typically 1-4% of transformer rating.
A pick up of 0.2 to 0.3 times the TAP is recommended for general cases.

The slope is defined by determining the potential sources of differential current.