Electrical Engineering Mcqs

For display of signal pattern _____________voltage is applied to the horizontal plates of a CRO?

• (A)  Sinusoidal
• (B)  Rectangular
• (C)  Sawtooth
• (D)  None of the above

Answer

Submitted By :Ali Uppal

A galvanometer of resistance G is shunted by a very small resistance S. The resistance of the resulting ammeter is ______________?

• (A)  GS/(G+S)
• (B)  G+S
• (C)  G-S
• (D)  None of the above

Answer

Submitted By :Ali Uppal

The sensitivity of a voltmeter which uses a 100 µA meter movement is ____________?

• (A)  1 kO/V
• (B)  10 kO/V
• (C)  5 kO/V
• (D)  Data insufficient

Answer

Submitted By :Ali Uppal

The materil used to coat inside the face of CRT is ______________?

• (A)  Carbon
• (B)  Sulphur
• (C)  Silicon
• (D)  Phosphorous

Answer

Submitted By :Ali Uppal

The most accurate device for measuring voltage is ____________?

• (A)  Voltmeter
• (B)  Multimeter
• (C)  CRO
• (D)  VTVM

Answer

Submitted By :Ali Uppal

An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is______________?

• (A)  nG
• (B)  (n-1)G
• (C)  G/(n-1)
• (D)  G/n

Answer

Submitted By :Ali Uppal

A CRO is used to measure _________________?

• (A)  Voltage
• (B)  Frequency
• (C)  Phase
• (D)  All of above

Answer

Submitted By :Ali Uppal

A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?

• (A)  nG
• (B)  G/n
• (C)  G/(n-1)
• (D)  (n-1)G

Answer

Submitted By :Ali Uppal

Which of the following is likely to have the largest resistance ?

• (A)  Voltmeter of range 10 V
• (B)  Moving coil galvanometer
• (C)  Ammeter of range 1 A
• (D)  A copper wire of length 1 m and diameter 3 mm

Answer

Submitted By :Ali Uppal

The resistance of an ideal voltmeter is ______________?

• (A)  Low
• (B)  Infinite
• (C)  Zero
• (D)  High

Answer

Submitted By :Ali Uppal