**1. The peak value of a sine wave is 200 V. Its
average value is**

- (A) 127.4 V

- (B) 141.4 V

- (C) 282.8 V

- (D) 200 V

**2. The inductance of a coil can be increased by**

- (A) Increasing core length

- (B) Decreasing the number of turns

- (C) Decreasing the diameter of the former

- (D) Choosing core material having high relative

permeability

**3. For a sine wave with peak value Imax
the r.m.s. value is**

- (A) 0.5 Imax

- (B) 0.707

- (C) 0.9

- (D) 1.414 Imax

**4. For a frequency of 200 Hz, the time period
will be**

- (A) 0.05 s

- (B) 0.005 s

- (C) 0.0005 s

- (D) 0.5 s

**5. The ratio of active power to apparent power
is known as factor.**

- (A) Demand

- (B) Load

- (C) Power

- (D) Form

**6. The best place to install a capacitor is**

- (A) Very near to inductive load

- (B) Across the terminals of the inductive load

- (C) Far away from the inductive load

- (D) Any where

**7. Inductance of a coil Varies**

- (A) Directly as the cross-sectional area of

magnetic core

- (B) Directly as square of number of turns

- (C) Inversely as the length of the iron path

- (D) As (A) to (C)

**8. Power factor of the following circuit will
be unity**

- (A) Inductance

- (B) Capacitance

- (C) Resistance

- (D) Both (A) and (B)

**9. The r.m.s. value of alternating current is
given by steady (D.C.) current which when flowing through a given circuit for a
given time produces**

- (A) The more heat than produced by A.C. when flowing

through the same circuit

- (B) The same heat as produced by A.C. when flowing

through the same circuit

- (C) The less heat than produced by A.C. flowing through

the same circuit

- (D) None of the above

**10. In a pure resistive circuit**

- (A) Current lags behind the voltage by 90°

- (B) Current leads the voltage by 90°

- (C) Current can lead or lag the voltage by 90°

- (D) Current is in phase with the voltage

**11. Time constant of a circuit is the time in
seconds taken after the application of voltage to each**

- (A) 25% of maximum value

- (B) 50% of maximum value

- (C) 63% of maximum value

- (D) 90% of the maximum value

**12. What will be the phase angle between two
alternating waves of equal frequency, when one wave attains maximum value the
other is at zero value?**

- (A) 0°

- (B) 45°

- (C) 90°

- (D) 180°

Show and hide multiple DIV using JavaScript

.main_div{text-align:left;}

.inner_div{margin-top:5px;}

.buttons a{font-size: 15px;}

.buttons a:hover{cursor:pointer; font-size: 15px;}

var divs = [“Menu1”, “Menu2”, “Menu3”, “Menu4”, “Menu5”, “Menu6”, “Menu7”, “Menu8”, “Menu9”, “Menu10”, “Menu11”, “Menu12”];

var visibleDivId = null;

function toggleVisibility(divId) {

if(visibleDivId === divId) {

visibleDivId = null;

} else {

visibleDivId = divId;

}

hideNonVisibleDivs();

}

function hideNonVisibleDivs() {

var i, divId, div;

for(i = 0; i < divs.length; i++) {
divId = divs[i];
div = document.getElementById(divId);
if(visibleDivId === divId) {
div.style.display = "block";
} else {
div.style.display = "none";
}
}
}