×
Detail Form
We will send your result on your email id and phone no. please fill detail
1.
The power factor Varies between
2.
Alternating current cannot be measured by dc ammeter, because
3.
The line that draws power supply to your house from street has
4.
A transformer works on the principle of
5.
A coil of self-inductance L is connected in series with a bulb B and an ac source. Brightness of the bulb decreases when
6.
Choose the correct statement.
7.
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately
8.
The peak Value of ac Voltage on a 220 V mains is
9.
Series ac circuit has inductance L, resistance R and angular frequency to, the quality factor Q is
10.
Which quantity is increased in a step-down transformer?