

MCQOPTIONS
This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your VITEEE knowledge and support exam preparation. Choose a topic below to get started.
1. |
In an electric kettle water boils in 10 m minutes. It is required to boil the boiler in 15 minutes, using same supply mains |
A. | length of heating element should be decreased |
B. | length of heating element should be increased |
C. | length of heating element has no effect on heating if water |
D. | none of the above |
Answer» B. length of heating element should be increased | |
2. |
A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will |
A. | decrease |
B. | increase |
C. | remain same |
D. | heater will burn out |
Answer» C. remain same | |
3. |
Which of the following quantities remain the same in all parts of a series circuit ? |
A. | Voltage |
B. | Current |
C. | Power |
D. | Resistance |
Answer» C. Power | |
4. |
The thickness of insulation provided on the conductor depends on |
A. | the magnitude of voltage on the conductor |
B. | the magnitude of current flowing through it |
C. | both (a) and (b) |
D. | none of the above |
Answer» B. the magnitude of current flowing through it | |
5. |
The insulation on a current carrying conductor is provided |
A. | to prevent leakage of current |
B. | to prevent shock |
C. | both of above factors |
D. | none of above factors |
Answer» D. none of above factors | |
6. |
The hot resistance of the bulb’s filament is higher than its cold resistance because the temperature co-efficient of the filament is |
A. | zero |
B. | negative |
C. | positive |
D. | about 2 ohms per degree |
Answer» D. about 2 ohms per degree | |
7. |
A closed switch has a resistance of |
A. | zero |
B. | about 50 ohms |
C. | about 500 ohms |
D. | infinity |
Answer» B. about 50 ohms | |
8. |
Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across |
A. | Rl |
B. | Ri |
C. | either Rl or Ri |
D. | none of them |
Answer» B. Ri | |
9. |
The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true ? |
A. | The current through each bulb in same |
B. | The voltage across each bulb is not same |
C. | The power dissipation in each bulb is not same |
D. | None of the above |
Answer» B. The voltage across each bulb is not same | |
10. |
Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open |
A. | there will be heavy current in the main line |
B. | rest of the two bulbs will not light |
C. | all three bulbs will light |
D. | the other two bulbs will light |
Answer» E. | |
11. |
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes |
A. | 0.4 ohm |
B. | 0.6 ohm |
C. | 0.8 ohm |
D. | 1.0 ohm |
Answer» B. 0.6 ohm | |
12. |
If a parallel circuit is opened in the main line, the current |
A. | increases in the branch of the lowest resistance |
B. | increases in each branch |
C. | is zero in all branches |
D. | is zero in the highest resistive branch |
Answer» D. is zero in the highest resistive branch | |
13. |
The resistance of a few meters of wire conductor in closed electrical circuit is |
A. | practically zero |
B. | low |
C. | high |
D. | very high |
Answer» B. low | |
14. |
A 3 Q resistor having 2 A current will dissipate the power of |
A. | 2 watts |
B. | 4 watts |
C. | 6 watts |
D. | 8 watts |
Answer» D. 8 watts | |
15. |
The filament of an electric bulb is made of |
A. | carbon |
B. | aluminium |
C. | tungsten |
D. | nickel |
Answer» D. nickel | |
16. |
In a series circuit with unequal resistances |
A. | the highest resistance has the most of the current through it |
B. | the lowest resistance has the highest voltage drop |
C. | the lowest resistance has the highest current |
D. | the highest resistance has the highest voltage drop |
Answer» E. | |
17. |
The minimum charge on an ion is |
A. | equal to the atomic number of the atom |
B. | equal to the charge of an electron |
C. | equal to the charge of the number of electrons in an atom (#) zero |
Answer» C. equal to the charge of the number of electrons in an atom (#) zero | |
18. |
The rating of a fuse wire is always expressed in |
A. | ampere-hours |
B. | ampere-volts |
C. | kWh |
D. | amperes |
Answer» E. | |
19. |
Insulating materials have the function of |
A. | preventing a short circuit between conducting wires |
B. | preventing an open circuit between the voltage source and the load |
C. | conducting very large currents |
D. | storing very high currents |
Answer» C. conducting very large currents | |
20. |
Varistors are |
A. | insulators |
B. | non-linear resistors |
C. | carbon resistors |
D. | resistors with zero temperature coefficient |
Answer» C. carbon resistors | |
21. |
Which one of the following does not have negative temperature co-efficient ? |
A. | Aluminium |
B. | Paper |
C. | Rubber |
D. | Mica |
Answer» B. Paper | |
22. |
A resistance having rating 10 ohms, 10 W is likely to be a |
A. | metallic resistor |
B. | carbon resistor |
C. | wire wound resistor |
D. | variable resistor |
Answer» D. variable resistor | |
23. |
All of the following are equivalent to watt except |
A. | (amperes) ohm |
B. | joules/sec. |
C. | amperes x volts |
D. | amperes/volt |
Answer» E. | |
24. |
For which of the following ‘ampere second’ could be the unit ? |
A. | Reluctance |
B. | Charge |
C. | Power |
D. | Energy |
Answer» C. Power | |
25. |
Which is the best conductor of electricity ? |
A. | Iron |
B. | Silver |
C. | Copper |
D. | Carbon |
Answer» C. Copper | |
26. |
Ohm’s law is not applicable to |
A. | vacuum tubes |
B. | carbon resistors |
C. | high voltage circuits |
D. | circuits with low current densities |
Answer» B. carbon resistors | |
27. |
Which of the following materials has a negative temperature co-efficient of resistance? |
A. | Copper |
B. | Aluminum |
C. | Carbon |
D. | Brass |
Answer» D. Brass | |
28. |
Which of the following statement is true both for a series and a parallel D.C. circuit? |
A. | Elements have individual currents |
B. | Currents are additive |
C. | Voltages are additive |
D. | Power are additive |
Answer» E. | |
29. |
Two resistors are said to be connected in series when |
A. | same current passes in turn through both |
B. | both carry the same value of current |
C. | total current equals the sum of branch currents |
D. | sum of IR drops equals the applied e.m.f. |
Answer» B. both carry the same value of current | |
30. |
You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect |
A. | two in parallel |
B. | two in parallel and one in series |
C. | three in parallel |
D. | three in series |
Answer» C. three in parallel | |
31. |
Which of the following material has nearly zero temperature co-efficient of resistance? |
A. | Manganin |
B. | Porcelain |
C. | Carbon |
D. | Copper |
Answer» B. Porcelain | |
32. |
Current velocity through a copper conductor is |
A. | the same as propagation velocity of electric energy |
B. | independent of current strength |
C. | of the order of a few ^.s/m |
D. | nearly 3 x 108 m/s |
Answer» D. nearly 3 x 108 m/s | |
33. |
A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is |
A. | 6.4 A, 6.9 A |
B. | 6.4 A, 9.6 A |
C. | 4.6 A, 6.9 A |
D. | 4.6 A, 9.6 A |
Answer» C. 4.6 A, 6.9 A | |
34. |
Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 0.25 Q. If the same four wires are connected is series the effective resistance will be |
A. | 1 Q |
B. | 2 Q |
C. | 3 Q |
D. | 4 Q |
Answer» E. | |
35. |
The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ? |
A. | 18 Q |
B. | 36 Q |
C. | 48 Q |
D. | 64 Q |
Answer» C. 48 Q | |
36. |
A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is |
A. | 400 Q |
B. | 600 Q |
C. | 800 Q |
D. | 1000 Q |
Answer» D. 1000 Q | |
37. |
In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is |
A. | 33 V |
B. | 66 v |
C. | 80 V |
D. | 132 V |
Answer» C. 80 V | |
38. |
An instrument which detects electric current is known as |
A. | voltmeter |
B. | rheostat |
C. | wattmeter |
D. | galvanometer |
Answer» E. | |
39. |
The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around |
A. | 1.2 x 10~8 Q-m |
B. | 1.4 x 10~8 Q-m |
C. | 1.6 x 10″”8 Q-m |
D. | 1.8 x 10″8 Q-m |
Answer» D. 1.8 x 10″8 Q-m | |
40. |
With rise in temperature the resistance of semi-conductors |
A. | decreases |
B. | increases |
C. | first increases and then decreases |
D. | remains constant |
Answer» B. increases | |
41. |
With rise in temperature the resistance of pure metals |
A. | increases |
B. | decreases |
C. | first increases and then decreases |
D. | remains constant |
Answer» B. decreases | |
42. |
The resistance of a conductor varies inversely as |
A. | length |
B. | area of cross-section |
C. | temperature |
D. | resistivity |
Answer» C. temperature | |
43. |
Conductance is reciprocal of |
A. | resistance |
B. | inductance |
C. | reluctance |
D. | capacitance |
Answer» B. inductance | |
44. |
The property of a conductor due to which it passes current is called |
A. | resistance |
B. | reluctance |
C. | conductance |
D. | inductance |
Answer» D. inductance | |
45. |
Out of the following which is an insulating material ? |
A. | Copper |
B. | Gold |
C. | Silver |
D. | Paper |
Answer» E. | |
46. |
Out of the following which is not a poor conductor ? |
A. | Cast iron |
B. | Copper |
C. | Carbon |
D. | Tungsten |
Answer» C. Carbon | |
47. |
The substances which have a large number of free electrons and offer a low resistance are called |
A. | insulators |
B. | inductors |
C. | semi-conductors |
D. | conductors |
Answer» E. | |
48. |
Electric pressure is also called |
A. | resistance |
B. | power |
C. | voltage |
D. | energy |
Answer» D. energy | |
49. |
The S.I. unit of power is |
A. | Henry |
B. | coulomb |
C. | watt |
D. | watt-hour |
Answer» D. watt-hour | |