In a dual beam oscilloscope

a)      There are two separate vertical inputs and two separate horizontal inputs

b)      There are two separate vertical inputs and there is only one set of horizontal deflection plates

c)       There is only one vertical input but there are two separate horizontal deflection plates

d)      There is only one vertical and one horizontal input

The conversion of a voltage value to a time interval is carried out by comparing the unknown voltage with a voltage ramp in a

a)      Ramp type DVM

b)      Integrating type DVM

c)       Continuous type DVM

d)      Successive approximation type DVM

Illumination is measured using which one of the following?

a)      Millivoltmeter

b)      Stroboscope

c)       Luxmeter

d)      pH meter

In a CRO, the time-base generators supply ramp voltage to

a)      Horizontal deflecting plates

b)      Vertical deflecting plates

c)       Both horizontal and vertical deflecting plates

d)      None of the above

In a CRT the highest positive potential is given to

a)      Focusing electrodes

b)      Cathode

c)       Vertical deflection plates

d)      Post deflection acceleration anode

Inductance is measured by which one of the following?

a)      Wien bridge

b)      Schering bridge

c)       Maxwell bridge

d)      Owen bridge

Which one of the following bridge is used for measurement of dielectric loss and power factor of a capacitor?

a)      Maxwell’s bridge

b)      Anderson bridge

c)       De sauty’s bridge

d)      Schering bridge

Wagners earth devices in an ac bridge circuits are used for

a)      Shielding all the bridge elements from external magnetic field

b)      Eliminating effect of the stray capacitance

c)       Minimizing the effect of intercomponent capacitance

d)      Eliminating all the node to earth capacitances

Vibration galvanometers, tunable amplifiers and head phones are used in

a)      Dc bridges

b)      Ac bridges

c)       Both dc and ac bridges

d)      Kelvin double bridge

Which one of the following instrument is used for standardization of drysdale ac potentiometer?

a)      Rectifier type ammeter

b)      PMMC ammeter

c)       Precision type electrodynamometer

d)      Thermocouple ammeter

The resistance of shunt for a precision grade ammeter can be best measured by

a)      De sauty bridge

b)      Schering bridge

c)       Max well bridge

d)      Kelvin double bridge

In an Anderson bridge, the unknown inductance is measured in

a)      Resistance

b)      Capacitance

c)       Inductance and resistance

d)      Resistance and capacitance

Hay’s bridge is suitable for the measurement of which one of the following?

a)      Inductance with Q<10

b)      Inductance with Q>10

c)       Capacitance with high dissipating factors

d)      Capacitance with low dissipating factors

If the power factor is below 0.5 in two wattmeter method of power measurement

a)      One of the wattmeter will give negative deflection

b)      Both the wattmeters will give negative deflection

c)       Both the wattmeters will give positive deflection

d)      Both the wattmeters will not give any deflection

The voltage coil of a single phase house energy meter

a)      Is highly resistive

b)      Is highly inductive

c)       Is highly capacitive

d)      Has a phase angle equal to load power factor angle

If an induction type energy meter runs fast, it can be slowed down by

a)      Lag adjustment

b)      Light load adjustment

c)       Adjusting the position of braking magnet and moving it closer to the center of the disc

d)      Adjusting the position of braking magnet and moving it away from  the center of the disc

Which one of the following frequency meter is suitable for measuring radio frequency?

a)      Vibrating reed frequency meter

b)      Weston frequency meter

c)       Electrical resonance frequency meter

d)      Heterodyne frequency meter

A galvanometer with a full scale current of 10 mA has a resistance of 1000Ω. The multiplying power (the ratio of measured current to galvanometer current) of a 100Ω shunt with this galvanometer is

a)      110

b)      100

c)       11

d)      10

The moving coil in a dynamometer wattmeter is connected

a)      In series with the fixed coil

b)      Across the supply

c)       In series with the load

d)      Across the load

Due to inductance in the pressure coil the dynamometer wattmeter reads

a)      Lower on lagging power factor and higher on leading power factor than the actual value

b)       higher on lagging power factor and lower on leading power factor than the actual value

c)       Actual value

d)      Always reads lower than the actual value