Download Basic Electricity Test 1 For ALP CBT II Exam
We are glad to provide basic electricity questions for Railway ALP CBT II exam which help you to improve preparation. It is Important for all competitive exam like SSC GD, RRB Group D, SSC CGL , and Many more…. . You can download PDF by Clicking the given link below
1. Ohm’s law is not applicable to
A. semi-conductors
B. D.C. circuits
C. small resistors
D. high currents
2.Temperature co-efficient of resistance is expressed in terms of
A. ohms/°C
B. mhos/ohm°C
C. ohms/ohm°C
D. mhos/°C
3.Which of the following materials has the least resistivity
A. Zinc
B. Lead
C. Mercury
D. Copper
4.When current flows through heater coil it glows but supply wiring does not glow because
A. current through supply line flows at slower speed
B. supply wiring is covered with in¬sulation layer
C. resistance of heater coil is more than the supply wires
D. supply wires are made of superior material
5.The condition for the validity under Ohm’s law is than
A. resistance must be uniform
B. current should be proportional to the size of the resistance
C. resistance must be wire wound type
D. temperature at positive end should be more than the temperature at negative end
6.A rheostat differs from potentiometer in the respect that it
A. has lower wattage rating
B. has higher wattage rating
C. has large number of turns
D. offers large number of tapping
7.An open resistor, when checked with an ohm-meter reads
A. zero
B. infinite
C. high but within tolerance
D. Low but not zero
8._____ are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
A. Varistors
B. Thermistor
C. Semi-conductors
D. Variable resistors
9.All good conductors have high
A. conductance
B. resistance
C. reluctance
D. thermal conductivity
10.Voltage dependent resistors are usually made from
A. charcoal
B. silicon carbide
C. nichrome
D. graphite
11.Voltage dependent resistors are used
A. for inductive circuits
B. to supress surges
C. as heating elements
D. as current stabilizers
12.If I, R and t are the current, resistance and time respectively, then according to Joule’s law heat produced will be proportional to
A. I²Rt
B. I²Rf
C. I²R²t
D. IRt
13.Nichrome wire is an alloy of
A. lead and zinc
B. chromium and vanadium
C. nickel and chromium
D. copper and silver
14.Which of the following can have negative temperature coefficient ?
A. Compounds of silver
B. Liquid metals
C. Metallic alloys
D. Electrolytes
15.One newton metre is same as
A. one watt
B. one joule
C. five joules
D. one joule second
16.If the efficiency of a machine is to be high, what should be low ?
A. Ratio of output to input
B. Losses
C. True component of power
D. kWh consumed
17.When electric current passes through a metallic conductor, its temperature rises. This is due to
A. collisions between conduction electrons and atoms
B.the release of conduction electrons from parent atoms
C.mutual collisions between metal atoms
D.mutual collisions between conducting electrons
18.A glass rod when rubbed with silk cloth is charged because
A. it takes in proton
B. its atoms are removed
C. it gives away electrons
D. it gives away positive charge
19.Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
A. Reactor
B. Capacitor
C. Inductor
D. Resistor
20.It becomes more difficult to remove
A. any electron from the
B. first electron from the orbit
C. second electron from the orbit
D. third electron from the orbit
21.When one leg of parallel circuit is opened out the total current will
A. reduce
B. increase
C. decrease
D. become zero
22.In a lamp load when more than one lamp are switched on the total resistance of the load
A. increases
B. decreases
C. remains same
D. none of these
23. A current carrying conductor is associated with
(a) A magnetic field
(b) An electric field
(c) An electro-magnetic field
(d) An electrostatic field
24.Farad is the unit of
(a) Resistance
(b) Conductance
(c) Capacitance
(d) Inductance
25.A good conductor while carrying current is
(a) Negatively charged
(b) Positively charged
(c) Electrically neutral
(d) Alternately charged positive and negative
26. Electrostatic precipitator is used to control
(a) Air pollution
(b) Water pollution
(c) Solid waste
(d) Noise pollution
27. The angle between the magnetic meridian and the geographical meridian and the geographical meridian at a place is
(a) Dip
(b) Declination
(c) Latitude
(d) Azimuth
28. A compass needle cannot be used to detect
(a) Magnetic North-South direction
(b) Polarity of a magnet
(c) Strength of a magnet
(d) Direction of magnetic field
29. Indicate the false statement about the resistance of a wire
(a) It depend on material of wire
(b) It is Directly proportional to the length of wire
(c) It is directly proportional to the area of cross-section of wire
(d) Resistance of metallic wire increases with increase in temperature
30. For which of the following substances, the resistance decreases with increase in temperature?
(a) Pure silicon
(b) Copper
(c) Nichrome
(d) Platinum
31. The ratio of intensity of magnetisation to the magnetisation force is known as
(a) flux density
(b) susceptibility
(c) relative permeability
(d) none of the above
32. When a bar magnet is cut into two equal halves, the pole strength of each piece
(a) Becomes double
(b) Becomes half
(c) Becomes zero
(d) Remains the same
33. Which among the following type of energy does a compressed spring will have?
(a) Elastic Potential Energy
(b) Kinetic Energy
(c) Heat Energy
(d) Nuclear Energy
34. Which among the following is the correct formula to measure the Density of a substance?
(a) Density = Volume / Mass
(b) Density = Mass × Volume
(c) Density = Mass × Volume / Power
(d) Density = Mass / Volume
35. What is the effect on the Velocity of an object if the speed of object changes?
(a) Velocity also changes
(b) Velocity remains same
(c) Velocity Increases
(d) Velocity Decreases
36. What happens when a stretched rubber band is released?
(a) Kinetic energy becomes zero
(b) Potential energy remains constant
(c) Kinetic Energy is converted to Potential Energy
(d) Potential Energy is converted to Kinetic Energy
37. What is the impact on a body with respect to energy when work is performed on it?
(a) Energy is gained
(b) Energy is lost
(c) Energy is first lost then gained
(d) No change in the energy
38. How is Average Velocity of a Body defined?
(a) Average Speed of the Body
(b) Distance Travelled
(c) Distance travelled in time ‘t’
(d) None of the above
39.Which among the following is an example of a Simple Machine?
(a) Pulley
(b) See Saw Bar
(c) Scissors
(d) All of the above
40. “Pyrometer” is used to measure –
(a) Heart Beat
(b) Water Pressure
(c) Very High Temperature
(d) Speed of Light
ANSWER:-
- a 2. c 3. d 4. c 5. a 6. b 7.b 8. c 9. a 10. b
11. b 12. a 13. c 14. d 15. b 16. b 17. a 18. c 19. d 20.d
21. c 22. b 23. a 24. c 25. a 26. a 27. b 28. c 29. c 30. a
31. b 32. d 33. a 34. d 35. b 36. d 37. a 38. c 39. d 40. c
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