when voltage drops what happens to current?

96 views
when voltage drops what happens to current?

Current increases

This depends on the power of the source.If power is kept constant then the voltage increases with decrease in current (P=VI) .But if lets say the source is replaced by new batteries then the current increases (V=IR).

Related questions

43 views

Description : In AC system, the voltage drops are due to (1) Resistance (2) Inductance (3) Capacitance (4) All of the above

4 views

Description : The total voltage of a series circuit is the _____________. A. sum of the individual voltage drops B. total resistance divided by the total current C. sum of the individual currents multiplied by the number of resistors D. total current divided by the total resistance

11 views

Description : main function of the current regulator is A. To prevent the reversal flow of current from the battery when dynamo speed is drops. B. To safeguard against flow of high currents to battery when armature develops ... . C. To prevent building up of high voltage in a circuit. D. None of the above

Last Answer : B. To safeguard against flow of high currents to battery when armature develops more current.

289 views

Description : Which is NOT a characteristic of a series circuit? w) The current is the same throughout. x) The total resistance is the sum of the individual resistance. y) The voltage of the source ... individual voltage drops. z) The total resistance is the sum of the reciprocals of the individual resistances.

Last Answer : ANSWER: Z -- THE TOTAL RESISTANCE IS THE SUM OF THE RECIPROCALS OF THE RECIPROCAL OF THE INDIVIDUAL RESISTANCES.

100 views

Description : The output voltage of a battery drops from 100 V with zero load current to 80 V when load current is 2 A. The internal resistance of the battery is (a) 10 Ω (b) 20 Ω (c) 40 Ω (d) 50 Ω

0 views

Description : What happens when we add few drops of iodine solution to raw potato?

0 views

Description : If a candidate's campaign owes more money than it has on hand, and then drops out of the race before it can raise enough cash to cover the debts, what happens?

Last Answer : Good question. Didn’t that happen with Dennis Kucinich too? I know he tried to pay it off; not sure on the outcome. I wonder how common this is?

0 views

Description : An inductor L', and a resistor R', are connected in series to an a.c source. The potential drop across inductor is 160 watts and that across the resistance R' is 120 volt. Find the virtual ... algebric sum of the potential drops across L and R more than this value? If yes, resolve the paradox.

2 views

Description : If voltage across a bulb rated 220 volt-100 watt drops by `2.5 %` of its value, the percentage of the rated value by which the power would decrease is

Last Answer : If voltage across a bulb rated 220 volt-100 watt drops by `2.5 %` of its value, the percentage of the rated value ... 20%` B. `2.5%` C. `5%` D. `10%`

0 views

Description : The illustrated motor controller _________. EL-0023 A. is a low voltage release controller because the motor will stop when voltage falls below a certain value and automaticly start when normal voltage ... with a generator or transformer bank that is 'wye' wound with T2 connected to the neutral

1 view

Description : The 'reset' contacts of the master switch shown in the illustration are ______________. EL-0102 A. closed only when the master switch is 'off' B. closed only when the master switch selects a 'run' condition C. opened separately by the winch operator D. opened when line voltage drops 10%

29 views

Description : When using Kirchhoff’s voltage law, how are voltage polarities assigned to the voltage drops across resistors?

Last Answer : The point at which current enters the resistor is assigned a negative polarity and the point at which current leaves the resistor is

144 views

Description : A d.c. shunt motor runs at no load speed of 1140 r.p.m. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full load speed in r.p.m. is (A) 1080 (B) 1203 (C) 1000 (D) 1200

Last Answer : (A) 1080

621 views

Description : The terminal voltage of a DC shunt generator drops on load because of all of the following except : (A) Armature reaction (B) Armature resistance drop (C) Commutation (D) Field weakening due to armature reaction and armature resistance drop

Last Answer : (D) Field weakening due to armature reaction and armature resistance drop

623 views

Description : The magnitude of various voltage drops that occur in an alternator depends on?

Last Answer : The magnitude of various voltage drops that occur in an alternator depends on load current.

166 views

Description : What happens to the angle between current and voltage, when a small capacitance is added in series with a highly inductive circuit?  (A) Increases (B) Remains same as earlier angle (C) Decreases (D) Becomes indeterminant

71 views

Description : when voltage increases what happens to current ?

Last Answer : Decrease

0 views

Description : A galvanometer, having a resistance of 100Ω gives a full scale deflection for a current of 1 mA. The resistance, which can convent this galvanometer into an ammeter, giving full scale deflection for a current of 10A, is R. This ... and 0.49Ω (3) 0.01Ω , 1V and 0.49Ω (4) 0.001Ω , 0.2V and 0.49Ω

190 views

Description : What happens insulators when high voltage passes through transmission lines whether it breaks or lose it's insulating property?

Last Answer : I think it will breaks when it crosses breakdown voltage .

123 views

Description : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

Last Answer : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known

177 views

Description : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

Last Answer : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero

22 views

Description : According to Ohm’s law, what happens to circuit current if the applied voltage (a) increases, (b) decreases?

Last Answer : (a) Current increases (b) Current decreases