Related Questions

Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?
A P = I2R
B P = IE
C P = E2/R
D I = P/E
E None of the above
Which one of the following equations most directly determines the amount of current flowing through a resistor when you know the value of the resistor and the voltage drop across it?
A E = PR
B E = I2R
C I = E/R
D I = ER
E None of the above
Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?
A R = E2/P
B P = PR
C P = E2/R
D I = P/E
E None of the above
If you know the current anywhere in a series circuit, you know the current everywhere in a series circuit.
A True
B False
To determine the polarity of the voltage drop across a resistor, it is necessary to know
A Value of current through the resistor
B Direction of current through the resistor
C Value of resistor
D E.m.f. in the circuit
In each of these questions , two equations (I) and (II ) are given . You have to solve both the equations and give answer .
A x
B x>y
C x≤y
D x≥y
In the question two equations numbered I and II are given . You have to solve both the equations and given answer.
A x
B x≤y
C x>y
D x≥y
The voltage drop, for constant voltage transmission is compensated by installing
A Inductors
B Capacitors
C Synchronous motors
D All of above
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
A mercury is a metal.
B density of mercury is greater than that of water.
C cohesion of mercury is greater than its adhesion with glass.
D cohesion of water is greater than its adhesion with glass.
The ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency

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