# A 35 V source is connected to a series circuit at 600 ohms and R as shown. If a voltmeter at internal resistance 1.2 kilo ohms is connected across 600 ohm resistor it reads ,5 V. The value of R is

1.  1.2 kilo Ohms

2.  2.4 kilo Ohms

3.  3.6 kilo Ohms

4.  7.2 kilo Ohms

4

2.4 kilo Ohms

Explanation :
No Explanation available for this question

# The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 A, is

1.  0.015 Joule

2.  0.15 Joules

3.  0.5 Joule

4.  1.15 Joules

4

0.15 Joules

Explanation :
No Explanation available for this question

# Two coils having equal resistance but different inductances are connected in series, the time constant of the series combination is the :

1.  sum of the time constants of the individual coils

2.  average of the time constants of individual coils

3.  geometric mean of the time constants of the individual coils

4.  product of the time comstants of the individual coils

5.

5

average of the time constants of individual coils

Explanation :
No Explanation available for this question

# At a certain current, the: energy stored in iron cored coil is 1000 J and its copper loss is 2000 W. The time constant (in seconds) of the coil is

1.  0.25

2.  0.5

3.  1.0

4.  2.0

4

1.0

Explanation :
No Explanation available for this question

# The current waveform in a pure resistor at 10Q is shown in the given figure, power dissipated in the resistor is

1.  7.29 W

2.  52.4 W

3.  135 W

4.  270 W

4

270 W

Explanation :
No Explanation available for this question

# A series RLC circuit consisting of R = 10 oh XL = 20 ohms and Xc = 20 ohms is connected across an ac supply of 100 V (rms). The magnitude and phase angle (with reference to supply voltage of the voltage across the inductive coil it respectively

1.  100 V, 900

2.  100 V, -900

3.  200 V, -900

4.  200 V, 900

4

200 V, 900

Explanation :
No Explanation available for this question

# When a unit impulse voltage is applied to an inductor of 1H, the energy supplied by the source is ......

1.  ∞

2.  1 J

3.  ½

4.   0

4

½

Explanation :
No Explanation available for this question

# In the figure below, the current of 1 ampere flo through the resistance of

1.  4 ohms

2.  20 ohms

3.  30 ohms

4.  12 ohms

4

12 ohms

Explanation :
No Explanation available for this question

# Two coils in differential connection self inductance of 2 mH and 4 mH and a mutual inductance of 0.15 mH. The equivalent inductant of the combination is

1.  5.7 mH

2.  5.85 mH.

3.  6 mH

4.  6.15 mH

4

5.7 mH

Explanation :
No Explanation available for this question

# In the network shown in the figure, the effective resistance faced by the voltage source is

1.  4 Ω

2.  3 Ω

3.  2 Ω

4.  1 Ω

4

3 Ω

Explanation :
No Explanation available for this question

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