GATE-19: Electrical Measurement & Measuring Instrument Quiz-2

Attempt now to get your rank among 457 students!

Question 1

A 150 V moving iron voltmeter of accuracy class 1-0 reads 75 V when used in a circuit under standard condition. The maximum possible percentage error in the reading is?

• A2.5 %
• B2 %
• C1 %
• D1.5 %

Question 2

A repulsion type moving iron instrument when used with AC circuits, the deflecting torque is?

• ADirectly proportional to the rms current
• BDirectly proportional to the square of rms current
• CDirectly proportional to the peak current
• DDirectly proportional to the square of the peak current

Question 3

A simple slide wire potentiometer is used for measurement of current in a circuit. The voltage drop across a standard resistor of 0.5 Ω is balanced at 95 cm. find the magnitude of the current if the standard cell emf of 1.95 volt is balanced at 60 cm.

• A6.175 A
• B4.256 A
• C8.234 A
• D1.0234 A

Question 4

For the given table find current I & deflection torque Td

Given deflection angle of θ = 30 o & spring constant Kc = 0.4 *10 -6 Nm/o

• A8.52*10 -6 Nm
• B11.99 *10 -6 Nm
• C5.99 *10 -6 Nm
• D3.629 *10 -6 Nm

Question 5

A PMMC instrument has a coil of dimension 15mm * 12 mm. The flux density in a air gap is 1.8 * 10 -3 wb/ m2 and the spring constant is 0.14 * 10 -6 n-m/rad. Determine the number of turns required to produce and angular deflection of 90 o. when current of 5mA flowing through the coil.

• A152
• B176
• C250
• D136

Question 6

A multi range DC voltmeter requires 10 mA to give full scale defelction, its resistance is 10 Ω’s. Find the resistance to be connected in series to extend the range of DC voltmeter.
(1) (0 – 10) V
(2) (0 - 50) V

• A990 Ω, 4.99 KΩ’s
• B970 Ω, 3.99 KΩ’s
• C900 Ω, 2.99 KΩ’s
• D790 Ω, 1.99 KΩ’s

• 457 attempts
• 2 upvotes
• 13 comments