Physics Test Chapter 15+16

1.     Magnetic compass needle will be deflecting, if it is kept near

a)     Static charges

b)    Soft iron

c)     Semi-conductor

d)    Accelerating charges

2.     The alternating current has frequency of 10⁶ Hz, in such a way that time period for completion of cycle is

a)     1µs

b)    1.5µs

c)     10⁶s

d)    1sec

3.     Which of the following device does not function like an electric motor?

a)     Galvanometer

b)    Ammeter

c)     Voltmeter

d)    Transformer

4.     The output voltage of a transformer is 3 times the input voltage, then trans ratio will be

a)     1/3

b)    3

c)     1

d)    6

5.     For long distance transmission, the transformer used is

a)     Step down

b)    Input voltage and output voltage remains same

c)     Step up

d)    Amplifier is used

6.     For parallel resonant circuit, the resonance current is

a)     Zero

b)    Minimum

c)     Maximum

d)    One

7.     In L.C parallel circuit, the coil draws

a)     Leading current

b)    Lagging voltage

c)     Lagging current

d)    Leading voltage