Electrical Engineering Questions and Answers


116)

How many degrees are there in π/3 rad?

Answer: Option B

Explanation: 

pi = 180 degree.

pi/3 rad = 180/3 = 60 degree.
117)

The conductive loop on the rotor of a simple two-pole, single-phase generator rotates at a rate of 400 rps. The frequency of the induced output voltage is

Answer: Option C

Explanation:

Here given data is:

No. of poles = 2;

Speed (N) = 400 rps;

Usually speed is calculated in rpm. So here we convert 400 rps (revolution per second) in terms of rpm (revolutions per minute).

As 1 min = 60 sec; we multiply 400x60 rpm;

As we know N = 120f/p.

f = np/120;

f = 400x60x2/120.

f = 400 hz.
118)

If the rms voltage drop across a 15 kΩ resistor is 16 V, the peak current through the resistor is

Answer: Option B

Explanation:

V=16
R=15k = 15000
Irms= V/R = 16/15000 = 0.001067A = 1.067mA
Imax=1.414*1.067mA = 1.51mA
119)

The mesh method can be applied to circuits with any number of loops.

Answer: Option A
120)

Second-order determinants are evaluated by subtracting the signed cross-products.

Answer: Option B

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