1. Electrical instruments are broadly divided into:
(A) Three types
(B) Two types
(C) Four types
(D) Five types
2. Absolute instruments are mainly used in:
(A) Houses
(B) Standard laboratories
(C) Industries
(D) Vehicles
3. Secondary instruments give:
(A) Indirect reading
(B) No reading
(C) Direct reading
(D) Calculated reading
4. Which of the following is an example of absolute instrument?
(A) Ammeter
(B) Voltmeter
(C) Tangent galvanometer
(D) Wattmeter
5. Which instrument needs calibration?
(A) Absolute instrument
(B) Digital instrument
(C) Secondary instrument
(D) None
6. Indicating instruments show:
(A) Stored value
(B) Instantaneous value
(C) Average value
(D) Total value
7. Recording instruments provide:
(A) Instant value only
(B) Continuous record
(C) No value
(D) Calculated value
8. Integrating instruments measure:
(A) Voltage
(B) Current
(C) Total energy over time
(D) Resistance
9. Example of integrating instrument is:
(A) Energy meter
(B) Ammeter
(C) Voltmeter
(D) Frequency meter
10. Digital instruments have:
(A) Moving parts
(B) No moving parts
(C) Heavy parts
(D) Magnetic parts
11. Analogue instruments are:
(A) Less accurate
(B) More accurate
(C) Digital
(D) Automatic
12. Which instrument is more accurate?
(A) Digital
(B) Analogue
(C) Both same
(D) None
13. Magnetic effect of current is used in:
(A) Few instruments
(B) No instruments
(C) Most instruments
(D) Only digital instruments
14. Heating effect of current depends on:
(A) V²
(B) IR
(C) I²R
(D) R²
15. Electrostatic instruments are used for:
(A) Low voltage
(B) Power
(C) Current
(D) High voltage
16. Deflecting force is used to:
(A) Stop motion
(B) Increase resistance
(C) Reduce error
(D) Move pointer
17. Controlling force acts:
(A) Same direction as deflecting
(B) Opposite to deflecting
(C) No direction
(D) Randomly
18. Damping force is used to:
(A) Reduce oscillations
(B) Increase speed
(C) Increase current
(D) Reduce voltage
19. Which damping method is most efficient?
(A) Air friction
(B) Fluid friction
(C) Gravity
(D) Eddy current
20. Tangent galvanometer works on:
(A) Ohm’s law
(B) Faraday law
(C) Tangent law
(D) Kirchhoff law