GATE-19 | Electrical Measurement | Semi-Quiz (App update required to attempt this test)

An electrically deflected Cathode Ray Tube has a final anode voltage of 2000 V and parallel deflecting plates 1.5 cm long and 5 mm apart. If the screen is 50 cm from the centre of deflecting plates, find velocity of beam _______X10⁶(in m/sec).

Consider the following statements regarding phase measurement with the help of CRO.
A) Lissajous pattern for ellipse 0<ɸ<90˚ and rotation is anticlockwise.
B) Lissajous pattern for straight line ɸ=0˚ (or) 360˚ and the slope is positive.
C) Lissajous pattern for circle 180<ɸ<360 and direction of rotation is anticlockwise.
D) Lissajous pattern for ellipse 180<ɸ<360˚ and rotation is clockwise.
Which of the following option is correct?

A Maxwell’s capacitance bridge is used to measure an unknown inductions in comparison with capacitance. The various values at balance .

R₂ = 400Ω; R₃ = 600 Ω; R₄ = 1000Ω

C₄ = 0.5μF

Then the value of storage factor of coil is _________.

If frequency is 1000Hz

An unbalanced delta connected load is connected to the terminals a, b, c of a 440V balance 3-phase supply. The load consists of

ab: a resistor of 15Ω

bc: a capacitor of 30Ω

ca: an inductor of 10Ω reactance and 5Ω resistance.

The reading of a wattmeter is……..(in KW) connected with its current coil in line a and pressure coil between line b and c, if the phase sequence is V_ab, V_bc, V_ca

Two types of connections of wattmeter pressure coil are shown in the figures below



the value of the wattmeter current coil resistance r, which makes the connection errors the same in the two cases is