McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
Chapters
| 1. |
Terminal potential difference of battery depends on |
| A. | current |
| B. | temperature |
| C. | both A and B |
| D. | resistance of external resistor |
| Answer» D. resistance of external resistor | |
| 2. |
Systematic errors occur due to |
| A. | overuse of instruments |
| B. | careless usage of instruments |
| C. | both A and B |
| D. | human sight |
| Answer» C. both A and B | |
| 3. |
In cells, internal resistance is due to |
| A. | components inside |
| B. | chemicals within |
| C. | lead blocks |
| D. | graphite |
| Answer» B. chemicals within | |
| 4. |
Measurement which is close to the true value is |
| A. | accurate |
| B. | average |
| C. | precise |
| D. | error |
| Answer» A. accurate | |
| 5. |
A train with a whistle that emits a note of frequency 800 Hz is approaching an observer at speed of 60 m s-1, the frequency of note heard by observer is {{}} |
| A. | 978 Hz |
| B. | 980 Hz |
| C. | 950 Hz |
| D. | 900 Hz |
| Answer» A. 978 Hz | |
| 6. |
Smallest division on a rule is of |
| A. | 1 cm |
| B. | 1 m |
| C. | 1 mm |
| D. | 10 cm |
| Answer» C. 1 mm | |
| 7. |
If the two quantizes are inversely proportional then graph between y and 1/x gives |
| A. | straight line cutting the axis |
| B. | straight line through origin |
| C. | a parabolic curve |
| D. | a hyperbolic curve |
| Answer» B. straight line through origin | |
| 8. |
Systematic errors can be removed by |
| A. | buying new instrument |
| B. | breaking the instrument |
| C. | dusting the instrument |
| D. | recalibrating the instrument |
| Answer» D. recalibrating the instrument | |
| 9. |
Least count of screw gauge is |
| A. | 0.01 cm |
| B. | 0.5 cm |
| C. | 0.1 cm |
| D. | 0.01 mm |
| Answer» D. 0.01 mm | |
| 10. |
Increase in kinetic energy of car having mass 800 kg and velocities ranging from 20 m s -1 to 30 m s -1 is {{}} |
| A. | 300 KJ |
| B. | 500 KJ |
| C. | 400 KJ |
| D. | 200 KJ |
| Answer» D. 200 KJ | |
| 11. |
Work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is |
| A. | 1000 kJ |
| B. | 1300 kJ |
| C. | 1400 kJ |
| D. | 1200 kJ |
| Answer» D. 1200 kJ | |
| 12. |
Internal resistance of cell when there is current of 0.40 A when a battery of 6.0 V is connected to a resistor of 13.5 Ω is |
| A. | 1.5 Ω |
| B. | 2.3 Ω |
| C. | 3.5 Ω |
| D. | 4.5 Ω |
| Answer» A. 1.5 Ω | |
| 13. |
Barrel of screw gauge has |
| A. | 100 divisions |
| B. | 50 divisions |
| C. | 10 divisions |
| D. | 45 divisions |
| Answer» B. 50 divisions | |
| 14. |
A measurement which on repetition gives same or nearly same result is called |
| A. | accurate measurement |
| B. | average measurement |
| C. | precise measurement |
| D. | estimated measurement |
| Answer» C. precise measurement | |
| 15. |
A motor of the lift provides a force of 20 kN which rises it by 18 m in 10 s, the output power of motor is |
| A. | 36 kW |
| B. | 46 kW |
| C. | 56 kW |
| D. | 66 kW |
| Answer» A. 36 kW | |
| 16. |
Actual range of values around a measurement is called |
| A. | error |
| B. | uncertainty |
| C. | accuracy |
| D. | precision |
| Answer» B. uncertainty | |
| 17. |
Depth of water in a bottle is 24.3 cm and uncertainty is 0.2 cm, percentage uncertainty in measurement is |
| A. | 0.82% |
| B. | 9% |
| C. | 1% |
| D. | 2% |
| Answer» A. 0.82% | |
| 18. |
While taking the reading, the line of sight should be |
| A. | at acute angle to the scale |
| B. | perpendicular to scale |
| C. | at obtuse angle to the scale |
| D. | parallel to the scale |
| Answer» B. perpendicular to scale | |
| 19. |
Maximum current a battery of e.m.f 3.0 V and internal resistance 1.0 Ω is |
| A. | 4.0 A |
| B. | 5.0 A |
| C. | 3.0 A |
| D. | 30 A |
| Answer» C. 3.0 A | |
| 20. |
In potential dividers, the output voltage depends upon the |
| A. | single resistor |
| B. | relative values of all resistors |
| C. | current |
| D. | temperature |
| Answer» B. relative values of all resistors | |
| 21. |
Calipers are used to measure the |
| A. | diameter |
| B. | length |
| C. | thickness |
| D. | volume |
| Answer» A. diameter | |
| 22. |
Smallest division on stopwatch is |
| A. | 0.1 s |
| B. | 0.05 s |
| C. | 0.01 s |
| D. | 1 s |
| Answer» C. 0.01 s | |
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