multiple choice electrical engineering: circuits n a resistors are in series, if
ID: 3348648 • Letter: M
Question
multiple choice electrical engineering: circuits
n a resistors are in series, if one of them opens, the total resistance of that leg of the circuit b. decreases. c. remains the same 1. Whe 2. When 4 resistors are in parallel, if one of them opens, the total resistance of that leg of the circuit b. decreases c. remains the same 3. Wh en the current drawn from an ideal voltage source increases, the voltage of the ideal source a. increases. b. decreases. c. remains the same Rs 75 If Ru i n Figure 1 is reduced to half its value, the power it dissipates wil 4. RL 75.00 a. increase b. decrease c. remain the same. Figure 1. Total power dissipation in series-parallel circuits is equal to the sum of all the individual component power dissipations 5. a. in any resistive circuit. b. only in the series portion of the circuit. c. only in the parallel portion of the circuit. d. only if all the components have the same value. e. is a false statement because total power equals V, x IT .Explanation / Answer
1. when there are 4 resistors in series if open resistance then total resistance decreases.
before open the resistance
Rt=r1+r2+r3+r4
after open the resistance
Rt=r1+r2+r3
then total resistance decreases
2. In 4 resistors in parallel if one of them is opend then total resistance is increases.
option A is correct
3. when the current drawn from an ideal voltage source inreases,the voltage of the ideal source decreases.
option B is correct.
4.power dissipation for reduced to half value of resistance then power disspation will also decreases.
power is directly proportional to the resistance.
5. total power dissipation in series parallel circuits is equal to the sum of all the individual component power is in any resistive circuit
option A is correct.
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