# A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF.The probe is used to measure the voltage between P and Q as shown in figure.The measured voltage will be

1.  3.53 V

2.  4.37 V

3.  4.54 V

4.  5.00 V

4

3.53 V

Explanation :
No Explanation available for this question

# A moving coil of a meter has 100 turns,and a length and depth of 10 mm and 20 mm respectively.It is positioned in a uniform radial flux density of 200 mT.The coil carries a current of 50 mA.The torque on the coil is

1.  200 μNm

2.  100 μNm

3.  2 μNm

4.  1 μNm

4

200 μNm

Explanation :
No Explanation available for this question

# A dc A-h meter is rated for 15A,250 V.The meter constant is 14.4 A-sec/rev.The meter constant at voltage may be expressed as

1.  3750 rev/kWh

2.  3600 rev/kWh

3.  1000 rev/kWh

4.  960 rev/kWh

4

1000 rev/kWh

Explanation :
No Explanation available for this question

# A moving iron ammeter produces a full scale torque of 240 μNm with deflection of 120o at a current of 10A.The rate of change of self-inductance (Μh/radian)of the instrument at full scale is

4

Explanation :
No Explanation available for this question

# A single-phase load is connected between  R and Y terminals of a 415 V,symmetrical .3-phase,4-wire system with phase sequence RYB.A wattmeter is connected in the system as shown in the figure.The power factor of the load is 0.8 lagging.The wattmeter will  read

1.  -795 W

2.  -597 W

3.  +597 W

4.  +795 W

4

-597 W

Explanation :
No Explanation available for this question

# A 50 Hz,bar primary CT has a secondary with 500 turns.The secondary supplies 5A current into a purely resistive burden of 1Ω.The magnetizing ampere-turns is 200.The phase angle between the primary and secondary current is

1.  4.6o

2.  85.4o

3.  94.60

4.  175.4o

4

4.6o

Explanation :
No Explanation available for this question

# The core flux in the CT of prob.under the given operating condition is

1.  0

2.  45.0 μWb

3.  22.5 mWb

4.  100.0 mWb

4

45.0 μWb

Explanation :
No Explanation available for this question

# A MOSFET rated for 15 A,carries a periodic current as shown in the figure.The ON state resistance of the MOSFET is 0.15Ω.The average ON state loss in the MOSFET is

1.  33.8 W

2.  15.0 W

3.  7.5 W

4.  3.8 W

4

7.5 W

Explanation :
No Explanation available for this question

# The triac circuit shown in the figure controls the ac output power to the resistance load.The peak power dissipation in the load is

1.  3968 W

2.  5290 W

3.  7935 W

4.  10580 W

4

10580 W

Explanation :
No Explanation available for this question

1.  10 A

2.  -30 A

3.  30 A

4.  40 A

4