Related Questions

Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?
A P = IE
B P = E2/R
C P = I2R
D I = P/E
E None of the above
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
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
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
In a circuit a 33 Q resistor carries a current of 2 A.. The voltage across the resistor is
A 33 V
B 66 V
C 80 V
D 132 V
If you know the current anywhere in a series circuit, you know the current everywhere in a series circuit.
A True
B False
Six arms negotiators -- M,O,P,R,S and T-- are to be seated at a round table to discuss disarmament. There are exactly six chairs around the table. Each negotiator sits facing the center of the table and is directly opposite a negotiators across the table.The seating arrangement is subject to the following restrictions : T cannot sit next to P;S cannot sit next to M;R must sit next to M. If T sits directly across the table from O, who must sit on the other side of P?
A M and O
B M and S
C O and R
D O and S
A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter 'D'. Let Δp be the pressure drop across the length 'L'. For a laminar flow, Δp is proportional to
A L ρv²/D
B L μ;V/D²
C D ρv²/L
D Μ V/L
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will
A Increase
B Decrease
C Remain unchanged
D Data insufficient to predict relative pressure drop

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