Answer: 2 Watts

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Questions

2
A 1 H inductance carrying the current of amperes will store the energy of

Answer: 2 Joules

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3
If two winding having self-inductances L1 and L2, and a mutual inductance m are connected in series will opposite, then the total inductance of series combination will be

Answer: L1 + L2 - 2M

4
An inductive circuit resistance 2 ohms and inductance 0.5 H is connected to a 250 volts, 50 Hz supply. What capacitance will be placed in parallel to produce resonance?

Answer: 714 micro-farad

5
Which of the following statement is true?

Answer: A galvanometer with low resistance in series is an ammeter

7
In the circuit given below, the ammeter reads 0.1 ampere and voltmeter 10 volts. The internal resistance of the ammeter is 1 ohm and that of voltmeter is 500 ohms. What is the value of R?

Answer: 125 ohms

9
A damped oscillation has the equation I = 50 e-10tsin 628 t. What will be the frequency of a oscillation?

Answer: 100 Hz

10
A 0.5 meter long conductor carrying a current of 2 amperes is placed in a magnetic field having the flux density of 0.05 wb/m2. What will be the amount of force experienced by the conductor?

Answer: 0.05 New

11
If a coil has a resistance of 10 ohms and an inductance of 1 H, what will be the value of current 0.1 second after switching on a 500 V d.c. supply?

Answer: 3.16 A

12
An electrical circuit is shown below, what will be the power dissipation in the circuit assuming P as power across R2 ?

Answer: 4/3 P

13
If two resistances connected in parallel and each dissipates 10 watts the total power supplied by the voltage source equals

Answer: 20 watts

14
If a parallel circuit is open in the main line, the current

Answer: Is zero in all branches

15
In which of the following circuits most current will be produced by the voltage source?

Answer: 5 volts across two 5 ohm resistance in parallel

16
If a wire conductor of 0.1 ohm resistance is doubled in length, its resistance becomes

Answer: 0.2 ohm

17
The square waveform of current has following relation between r.m.s. value and average value

Answer: R.M.S. value of the current is to average value

18
The transient currents are associated with the

Answer: Changes in the stored energy in the inductors and capacitors

20
Two 500 ohms, 1 watt resistors are connected in parallel. Their combined resistance and wattage rating will be

Answer: 250 ohms, 2 watts

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