1. A carrier of 250V and 1.5 kHz is modulated by a 75V, 1 kHz sine wave signal. Find the modulation factor?
a) 20% b) 30% c) 40% d) 60%
2. Modulation index for FM can be………………..unit.
a) greater than b) less than c) equal to d) zero
3. Modulation index of FM, mf is………………
a) b) c) d)
4. The maximum peak to peak voltage of an AM wave is 16mV and the minimum peak to peak voltage is 4mV. Calculate the modulation factor.
a) 50% b) 60% c) 30% d) 66%
5. The DC output of a power supply is 12V at no load and 11V at full load. Calculate the percentage of load regulation.
a) 83% b) 0.83% c) 8.3% d) 0.083%
6. Calculate the backup for an system UPS. Load is the usage power. Suppose we are working a PC, then the load is around 300W. Power factor varies for device to device. The average power factor is 1.4. Voltage of the battery is 12V in each battery, battery Ah used for the UPS is 7.
a) 39 hours b) 30 minutes c) 39 minutes d) 49 minutes
7. The speed of rotating magnetic field in the stator, Ns:
a) b) c) d)
8. Calculate synchronous speed of a rotating magnetic field having 2 poles.
a) 3000 b) 2000 c) 6000 d) 5000
9. Base of the octal number system is………….
a) 2 b) 7 c) 8 d) 16
10. Convert (110110.101)2 into decimal.
a) 54.75 b) 54.625 c) 53.125 d) 53.75
11. Convert (783)10 to hexadecimal.
a) 30E b) 3015 c) 3014 d) 30F
12. (110101)2 - (1011)2 is…………..
a) (101010)2 b) (110110)2 c) (101100)2 d) (100100)2
13. 9’s complement of 454 is………
a) 999 b) 454 c) 544 d) 545
14. Simplify (A+B) (A+ ̅) is………..
a) A+B b) A+1 c) A d) ̅̅̅̅̅̅̅̅
15. A+ ̅ is………
a) A b) 1 c) 0 d) ̅
16. The maximum value of the frictional force before the body just slides over the surface of another body is called………….
a) Static b) Limiting c) Co-efficient d) Dynamic
17. A horizontal force of 490N is required to slide a sledge weighing 600kgF over a flat surface. Calculate co-efficient of friction.
a) 8.3 b) 0.83 c) 0.083 d) 83
18. Rahul bought a book for Rs. 250/- and sold it for Rs. 340/-. Find his profit % or loss %?
a) 26.47% b) 36% c) 100% d) 73.53%
19. If a chair was sold for Rs. 1250/- at a loss of Rs. 220/-, find the cost price of the chair?
a) Rs. 1030/- b) Rs. 1470/- c) Rs. 1100/- d) Rs. 1300/-
20. Horizontal component of a force P which makes an angle α with the horizontal is given by.....................
a) b) c) d)
21. The kind of equilibrium in which the position of centre of gravity is not disturbed is called…………
a) Stable b) unstable c) neutral d) none of these
22. What is the resultant of two unlike parallel forces of 25N?
a) 50 b) 0 c) 625 d) 1
23. Two forces having magnitude 5N each makes a resultant of 5N. Then find the angle between the two forces?
a) 60° b) 90° c) 120° d) 240°
24. A force equal and opposite to the resultant of the force acting on a body is called…………..
a) Equivalent force b) Equilibriant c) Equal force d) Equipotential force
25. Meera bought a scientific calculator for Rs. 850/- and sold it for Rs. 600/-. Find her profit % or loss %?
a) 70.6% b) 41.6% c) 29.4% d) 23.5%
a) 20% b) 30% c) 40% d) 60%
2. Modulation index for FM can be………………..unit.
a) greater than b) less than c) equal to d) zero
3. Modulation index of FM, mf is………………
a) b) c) d)
4. The maximum peak to peak voltage of an AM wave is 16mV and the minimum peak to peak voltage is 4mV. Calculate the modulation factor.
a) 50% b) 60% c) 30% d) 66%
5. The DC output of a power supply is 12V at no load and 11V at full load. Calculate the percentage of load regulation.
a) 83% b) 0.83% c) 8.3% d) 0.083%
6. Calculate the backup for an system UPS. Load is the usage power. Suppose we are working a PC, then the load is around 300W. Power factor varies for device to device. The average power factor is 1.4. Voltage of the battery is 12V in each battery, battery Ah used for the UPS is 7.
a) 39 hours b) 30 minutes c) 39 minutes d) 49 minutes
7. The speed of rotating magnetic field in the stator, Ns:
a) b) c) d)
8. Calculate synchronous speed of a rotating magnetic field having 2 poles.
a) 3000 b) 2000 c) 6000 d) 5000
9. Base of the octal number system is………….
a) 2 b) 7 c) 8 d) 16
10. Convert (110110.101)2 into decimal.
a) 54.75 b) 54.625 c) 53.125 d) 53.75
11. Convert (783)10 to hexadecimal.
a) 30E b) 3015 c) 3014 d) 30F
12. (110101)2 - (1011)2 is…………..
a) (101010)2 b) (110110)2 c) (101100)2 d) (100100)2
13. 9’s complement of 454 is………
a) 999 b) 454 c) 544 d) 545
14. Simplify (A+B) (A+ ̅) is………..
a) A+B b) A+1 c) A d) ̅̅̅̅̅̅̅̅
15. A+ ̅ is………
a) A b) 1 c) 0 d) ̅
16. The maximum value of the frictional force before the body just slides over the surface of another body is called………….
a) Static b) Limiting c) Co-efficient d) Dynamic
17. A horizontal force of 490N is required to slide a sledge weighing 600kgF over a flat surface. Calculate co-efficient of friction.
a) 8.3 b) 0.83 c) 0.083 d) 83
18. Rahul bought a book for Rs. 250/- and sold it for Rs. 340/-. Find his profit % or loss %?
a) 26.47% b) 36% c) 100% d) 73.53%
19. If a chair was sold for Rs. 1250/- at a loss of Rs. 220/-, find the cost price of the chair?
a) Rs. 1030/- b) Rs. 1470/- c) Rs. 1100/- d) Rs. 1300/-
20. Horizontal component of a force P which makes an angle α with the horizontal is given by.....................
a) b) c) d)
21. The kind of equilibrium in which the position of centre of gravity is not disturbed is called…………
a) Stable b) unstable c) neutral d) none of these
22. What is the resultant of two unlike parallel forces of 25N?
a) 50 b) 0 c) 625 d) 1
23. Two forces having magnitude 5N each makes a resultant of 5N. Then find the angle between the two forces?
a) 60° b) 90° c) 120° d) 240°
24. A force equal and opposite to the resultant of the force acting on a body is called…………..
a) Equivalent force b) Equilibriant c) Equal force d) Equipotential force
25. Meera bought a scientific calculator for Rs. 850/- and sold it for Rs. 600/-. Find her profit % or loss %?
a) 70.6% b) 41.6% c) 29.4% d) 23.5%
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