# If the inductance and capacitance of a, system are 1 H and 0.01μF respectively and the instantaneous value of current interrupted is 10 amps. The value of shunt resistance across the breaker for critical damping is

1.  1000Ω

2.  10kΩ

3.  5kΩ

4.  1kΩ

4

5kΩ

Explanation :
No Explanation available for this question

# What will happen if a voltmeter is connected like an ammeter in series to the load

1.  The meter will burn out

2.  The measurement will be too high

3.  An inadmissably high current will flow

4.  There will be almost no current in the circuit

4

There will be almost no current in the circuit

Explanation :
No Explanation available for this question

# Which one of the following types of indicating instruments is an electrometer

1.  Electrodynamometer

2.  PMNIC

3.  Electrostatic

4.  Moving iron

4

Electrostatic

Explanation :
No Explanation available for this question

# An IDMT over current relay has a current setting of 15% and has a time multiplier setting of 0.5. The relay is connected in the circuit through a CT having 500 : 5. What is the time of operation of the relay if the, circuit carries a fault current of 6000 A

1.  2.5 sec

2.  1.25 sec

3.  1.575 sec

4.   32 sec

4

1.575 sec

Explanation :
No Explanation available for this question

# For the voltmeter circuit shown in the given figure, the basic D'Arsonval meter used has full-scale current of 1 mA and meter resistance (Rm) of 100 ohms. The values of the series resistance R1and R2, required for 10 V range and 50 V range will he respectively

1.  9.9kΩ and 40kΩ

2.  10kΩ and 50kΩ

3.  20kΩ and 30kΩ

4.  200kΩ and 250kΩ

4

9.9kΩ and 40kΩ

Explanation :
No Explanation available for this question

# The frequency of transient oscillation will be

1.  14.2 kHz

2.  13 .29 kHz

3.  10 kHz

4.  none of the above

4

13 .29 kHz

Explanation :
No Explanation available for this question

# In the case of power measurement by two wattmeter method in a balanced 3-phase system with a pure inductive lead

1.  both the wattmeter will indicated the same value but with opposite signs

2.  both the wattmeter will indicate zero

3.  both the wattmeter will indicate the sane value with same sign

4.  one wattmeter will indicate zero and the other will indicate Some non-zero value

4

both the wattmeter will indicated the same value but with opposite signs

Explanation :
No Explanation available for this question

# The maximum value of Rate of Rise of Restriking Voltage (RRRV) is

1.  10.01 kV/ s

2.  9.01 kV/ s

3.  12.2 kV sec

4.  2.0 kV/s

4

9.01 kV/ s

Explanation :
No Explanation available for this question

# A230 V, 10A single-Phase energy meter makes 90 revolutions in 3 minutes at half load rated voltage and unity pf .If the meter constant is 1800 revolutions/kWh, then its error at halfload will be

1.  13.04 % slow

2.  13.04 % fast

3.  15 % slow

4.  15 % fast

4

15 \% slow

Explanation :
No Explanation available for this question

1.  5 A

2.  10 A

3.  20 A

4.  50 A

4